III.

Ticklishness—Its Origin and Significance—The Psychology of Tickling—Laughter—Laughter as a Kind of Detumescence—The Sexual Relationships of Itching—The Pleasure of Tickling—Its Decrease with Age and Sexual Activity.

Ticklishness—Its Origin and Significance—The Psychology of Tickling—Laughter—Laughter as a Kind of Detumescence—The Sexual Relationships of Itching—The Pleasure of Tickling—Its Decrease with Age and Sexual Activity.

Touch, as has already been remarked, is the least intellectual of the senses. There is, however, one form of touch sensation—that is to say, ticklishness—which is of so special and peculiar a nature that it has sometimes been put aside in a class apart from all other touch sensations. Scaliger proposed to class titillation as a sixth, or separate, sense. Alrutz, of Upsala, regards tickling as a milder degree of itching, and considers that the two together constitute a sensation of distinct quality with distinct end-organs, for the mediation of that quality.[5]However we may regard this extreme view, tickling is certainly a specialized modification of touch and it is at the same time the most intellectual mode of touch sensation and that with the closest connection with the sexual sphere. To regard tickling as an intellectual manifestation may cause surprise, more especially when it is remembered that ticklishness is a form of sensation which reaches full development very early in life, and it has to be admitted that, as compared even with the messages that may be sent through smell and taste, the intellectual element in ticklishness remains small. But its presence here has been independently recognized by various investigators. Groos points out the psychic factor in tickling as evidenced by the impossibility of self-tickling.[6]Louis Robinson considers that ticklishness "appears to be one of the simplest developments of mechanical and automatic nervous processes in the direction of the complex functioning ofthe higher centres which comes within the scope of psychology,"[7]Stanley Hall and Allin remark that "these minimal touch excitations represent the very oldest stratum of psychic life in the soul."[8]Hirman Stanley, in a somewhat similar manner, pushes the intellectual element in ticklishness very far back and associates it with "tentacular experience." "By temporary self-extension," he remarks, "even low amœboid organisms have slight, but suggestive, touch experiences that stimulate very general and violent reactions, and in higher organisms extended touch-organs, as tentacles, antennæ, hair, etc., become permanent and very delicately sensitive organs, where minimal contacts have very distinct and powerful reactions." Thus ticklishness would be the survival of long passed ancestral tentacular experience, which, originally a stimulation producing intense agitation and alarm, has now become merely a play activity and a source of keen pleasure.[9]

We need not, however, go so far back in the zoölogical series to explain the origin and significance of tickling in the human species. Sir J. Y. Simpson suggested, in an elaborate study of the position of the child in the womb, that the extreme excitomotory sensibility of the skin in various regions, such as the sole of the foot, the knee, the sides, which already exists before birth, has for its object the excitation and preservation of the muscular movements necessary to keep the fœtus in the most favorable position in the womb.[10]It is, in fact, certainly the case that the stimulation of all the ticklish regions in the body tends to produce exactly that curled up position of extreme muscular flexion and general ovoid shape which is the normal position of the fœtus in the womb. We may well believe that in this early developed reflex activity we have thebasis of that somewhat more complex ticklishness which appears somewhat later.

The mental element in tickling is indicated by the fact that even a child, in whom ticklishness is highly developed, cannot tickle himself; so that tickling is not a simple reflex. This fact was long ago pointed out by Erasmus Darwin, and he accounted for it by supposing that voluntary exertion diminishes the energy of sensation.[11]This explanation is, however, inadmissible, for, although we cannot easily tickle ourselves by the contact of the skin with our own fingers, we can do so with the aid of a foreign body, like a feather. We may perhaps suppose that, as ticklishness has probably developed under the influence of natural selection as a method of protection against attack and a warning of the approach of foreign bodies, its end would be defeated if it involved a simple reaction to the contact of the organism with itself. This need of protection it is which involves the necessity of a minimal excitation producing a maximal effect, though the mechanism whereby this takes place has caused considerable discussion. We may, it is probable, best account for it by invoking the summation-irradiation theory of pain-pleasure, the summation of the stimuli in their course through the nerves, aided by capillary congestion, leading to irradiation due to anastomoses between the tactile corpuscles, not to speak of the much wider irradiation which is possible by means of central nervous connections.

Prof. C. L. Herrick adopts this explanation of the phenomena of tickling, and rests it, in part, on Dogiel's study of the tactile corpuscles ("Psychological Corollaries of Modern Neurological Discoveries,"Journal of Comparative Neurology, March, 1898). The following remarks of Prof. A. Allin may also be quoted in further explanation of the same theory: "So far as ticklishness is concerned, a very important factor in the production of this feeling is undoubtedly that of the summation of stimuli. In a research of Stirling's, carried on under Ludwig's direction, it was shown that reflex contractions only occur from repeated shocks to the nerve-centres—that is, through summation of successive stimuli. That this result is also due in some degree to an alternating increasein the sensibility of the various areas in question from altered supply of blood is reasonably certain. As a consequence of this summation-process there would result in many cases and in cases of excessive nervous discharge the opposite of pleasure, namely: pain. A number of instances have been recorded of death resulting from tickling, and there is no reason to doubt the truth of the statement that Simon de Montfort, during the persecution of the Albigenses, put some of them to death by tickling the soles of their feet with a feather. An additional causal factor in the production of tickling may lie in the nature and structure of the nervous process involved in perception in general. According to certain histological researches of recent years we know that between the sense-organs and the central nervous system there exist closely connected chains of conductors or neurons, along which an impression received by a single sensory cell on the periphery is propagated avalanchelike through an increasing number of neurons until the brain is reached. If on the periphery a single cell is excited the avalanchelike process continues until finally hundreds or thousands of nerve-cells in the cortex are aroused to considerable activity. Golgi, Ramón y Cajal, Koelliker, Held, Retzius, and others have demonstrated the histological basis of this law for vision, hearing, and smell, and we may safely assume from the phenomena of tickling that the sense of touch is not lacking in a similar arrangement. May not a suggestion be offered, with some plausibility, that even in ideal or representative tickling, where tickling results, say, from someone pointing a finger at the ticklish places, this avalanchelike process may be incited from central centres, thus producing, although in a modified degree, the pleasant phenomena in question? As to the deepest causal factor, I should say that tickling is the result of vasomotor shock." (A. Allin, "On Laughter,"Psychological Review, May, 1903.)

Prof. C. L. Herrick adopts this explanation of the phenomena of tickling, and rests it, in part, on Dogiel's study of the tactile corpuscles ("Psychological Corollaries of Modern Neurological Discoveries,"Journal of Comparative Neurology, March, 1898). The following remarks of Prof. A. Allin may also be quoted in further explanation of the same theory: "So far as ticklishness is concerned, a very important factor in the production of this feeling is undoubtedly that of the summation of stimuli. In a research of Stirling's, carried on under Ludwig's direction, it was shown that reflex contractions only occur from repeated shocks to the nerve-centres—that is, through summation of successive stimuli. That this result is also due in some degree to an alternating increasein the sensibility of the various areas in question from altered supply of blood is reasonably certain. As a consequence of this summation-process there would result in many cases and in cases of excessive nervous discharge the opposite of pleasure, namely: pain. A number of instances have been recorded of death resulting from tickling, and there is no reason to doubt the truth of the statement that Simon de Montfort, during the persecution of the Albigenses, put some of them to death by tickling the soles of their feet with a feather. An additional causal factor in the production of tickling may lie in the nature and structure of the nervous process involved in perception in general. According to certain histological researches of recent years we know that between the sense-organs and the central nervous system there exist closely connected chains of conductors or neurons, along which an impression received by a single sensory cell on the periphery is propagated avalanchelike through an increasing number of neurons until the brain is reached. If on the periphery a single cell is excited the avalanchelike process continues until finally hundreds or thousands of nerve-cells in the cortex are aroused to considerable activity. Golgi, Ramón y Cajal, Koelliker, Held, Retzius, and others have demonstrated the histological basis of this law for vision, hearing, and smell, and we may safely assume from the phenomena of tickling that the sense of touch is not lacking in a similar arrangement. May not a suggestion be offered, with some plausibility, that even in ideal or representative tickling, where tickling results, say, from someone pointing a finger at the ticklish places, this avalanchelike process may be incited from central centres, thus producing, although in a modified degree, the pleasant phenomena in question? As to the deepest causal factor, I should say that tickling is the result of vasomotor shock." (A. Allin, "On Laughter,"Psychological Review, May, 1903.)

The intellectual element in tickling conies out in its connection with laughter and the sense of the comic, of which it may be said to constitute the physical basis. While we are not here concerned with laughter and the comic sense,—a subject which has lately attracted considerable attention,—it may be instructive to point out that there is more than an analogy between laughter and the phenomena of sexual tumescence and detumescence. The process whereby prolonged tickling, with its nervous summation and irradiation and accompanying hyperæmia, finds sudden relief in an explosion of laughter is a real example of tumescence—as it has been defined in the study in another volume entitled "An Analysis of the SexualImpulse"—resulting finally in the orgasm of detumescence. The reality of the connection between the sexual embrace and tickling is indicated by the fact that in some languages, as in that of the Fuegians,[12]the same word is applied to both. That ordinary tickling is not sexual is due to the circumstances of the case and the regions to which the tickling is applied. If, however, the tickling is applied within the sexual sphere, then there is a tendency for orgasm to take place instead of laughter. The connection which, through the phenomena of tickling, laughter thus bears to the sexual sphere is well indicated, as Groos has pointed out, by the fact that in sexually-minded people sexual allusions tend to produce laughter, this being the method by which they are diverted from the risks of more specifically sexual detumescence.[13]

Reference has been made to the view of Alrutz, according to which tickling is a milder degree of itching. It is more convenient and probably more correct to regard itching or pruritus, as it is termed in its pathological forms, as a distinct sensation, for it does not arise under precisely the same conditions as tickling nor is it relieved in the same way. There is interest, however, in pointing out in this connection that, like tickling, itching has a real parallelism to the specialized sexual sensations. Bronson, who has very ably interpreted the sensations of itching (New York Neurological Society, October 7, 1890;Medical News, February 14, 1903, and summarized in theBritish Medical Journal, March 7, 1903; and elsewhere), regards it as a perversion of the sense of touch, a dysæsthesia due to obstructed nerve-excitation with imperfect conduction of the generated force into correlated nervous energy. The scratching which relieves itching directs the nervous energy into freer channels, sometimes substituting for the pruritus either painful or voluptuous sensations. Such voluptuous sensations may be regarded as a generalized aphrodisiac sense comparable to the specialized sexual orgasm. Bronson refers to the significant fact that itching occurs so frequently in the sexual region, and states that sexual neurasthenia is sometimes the only discoverable cause of genital and anal pruritus. (Cf.discussion on pruritus,British Medical Journal,November 30, 1895.) Gilman, again (American Journal of Psychology, vi, p. 22), considers that scratching, as well as sneezing, is comparable to coitus.

Reference has been made to the view of Alrutz, according to which tickling is a milder degree of itching. It is more convenient and probably more correct to regard itching or pruritus, as it is termed in its pathological forms, as a distinct sensation, for it does not arise under precisely the same conditions as tickling nor is it relieved in the same way. There is interest, however, in pointing out in this connection that, like tickling, itching has a real parallelism to the specialized sexual sensations. Bronson, who has very ably interpreted the sensations of itching (New York Neurological Society, October 7, 1890;Medical News, February 14, 1903, and summarized in theBritish Medical Journal, March 7, 1903; and elsewhere), regards it as a perversion of the sense of touch, a dysæsthesia due to obstructed nerve-excitation with imperfect conduction of the generated force into correlated nervous energy. The scratching which relieves itching directs the nervous energy into freer channels, sometimes substituting for the pruritus either painful or voluptuous sensations. Such voluptuous sensations may be regarded as a generalized aphrodisiac sense comparable to the specialized sexual orgasm. Bronson refers to the significant fact that itching occurs so frequently in the sexual region, and states that sexual neurasthenia is sometimes the only discoverable cause of genital and anal pruritus. (Cf.discussion on pruritus,British Medical Journal,November 30, 1895.) Gilman, again (American Journal of Psychology, vi, p. 22), considers that scratching, as well as sneezing, is comparable to coitus.

The sexual embrace has an intimate connection with the phenomena of ticklishness which could not fail to be recognized. This connection is, indeed, the basis of Spinoza's famous definition of love,—"Amor est titillatio quædam concomitante idea causæ externæ,"—a statement which seems to be reflected in Chamfort's definition of love as "l'échange de deux fantaisies, et le contact de deux epidermes." The sexual act, says Gowers, is, in fact, a skin reflex.[14]"The sexual parts," Hall and Allin state, "have a ticklishness as unique as their function and as keen as their importance." Herrick finds the supreme illustration of the summation and irradiation theory of tickling in the phenomena of erotic excitement, and points out that in harmony with this the skin of the sexual region is, as Dogiel has shown, that portion of the body in which the tactile corpuscles are most thoroughly and elaborately provided with anastomosing fibres. It has been pointed out[15]that, when ordinary tactile sensibility is partially abolished,—especially in hemianæsthesia in the insane,—some sexual disturbance is specially apt to be found in association.

In young children, in girls even when they are no longer children, and occasionally in men, tickling may be a source of acute pleasure, which in very early life is not sexual, but later tends to become so under circumstances predisposing to the production of erotic emotion, and especially when the nervous system is keyed up to a high tone favorable for the production of the maximum effect of tickling.

"When young," writes a lady aged 28, "I was extremely fond of being tickled, and I am to some extent still. Between the ages of 10 and 12 it gave me exquisite pleasure, which I now regard as sexualin character. I used to bribe my younger sister to tickle my feet until she was tired."Stanley Hall and Allin in their investigation of the phenomena of tickling, largely carried out among young women teachers, found that in 60 clearly marked cases ticklishness was more marked at one time than another, "as when they have been 'carrying on,' or are in a happy mood, are nervous or unwell, after a good meal, when being washed, when in perfect health, when with people they like, etc." (Hall and Allin, "Tickling and Laughter,"American Journal of Psychology, October, 1897.) It will be observed that most of the conditions mentioned are such as would be favorable to excitations of an emotionally sexual character.The palms of the hands may be very ticklish during sexual excitement, especially in women, and Moll (Konträre Sexualempfindung, p. 180) remarks that in some men titillation of the skin of the back, of the feet, and even of the forehead evokes erotic feelings.It may be added that, as might be expected, titillation of the skin often has the same significance in animals as in man. "In some animals," remarks Louis Robinson (art. "Ticklishness,"Dictionary of Psychological Medicine), "local titillation of the skin, though in parts remote from the reproductive organs, plainly acts indirectly upon them as a stimulus. Thus, Harvey records that, by stroking the back of a favorite parrot (which he had possessed for years and supposed to be a male), he not only gave the bird gratification,—which was the sole intention of the illustrious physiologist,—but also caused it to reveal its sex by laying an egg."

"When young," writes a lady aged 28, "I was extremely fond of being tickled, and I am to some extent still. Between the ages of 10 and 12 it gave me exquisite pleasure, which I now regard as sexualin character. I used to bribe my younger sister to tickle my feet until she was tired."

Stanley Hall and Allin in their investigation of the phenomena of tickling, largely carried out among young women teachers, found that in 60 clearly marked cases ticklishness was more marked at one time than another, "as when they have been 'carrying on,' or are in a happy mood, are nervous or unwell, after a good meal, when being washed, when in perfect health, when with people they like, etc." (Hall and Allin, "Tickling and Laughter,"American Journal of Psychology, October, 1897.) It will be observed that most of the conditions mentioned are such as would be favorable to excitations of an emotionally sexual character.

The palms of the hands may be very ticklish during sexual excitement, especially in women, and Moll (Konträre Sexualempfindung, p. 180) remarks that in some men titillation of the skin of the back, of the feet, and even of the forehead evokes erotic feelings.

It may be added that, as might be expected, titillation of the skin often has the same significance in animals as in man. "In some animals," remarks Louis Robinson (art. "Ticklishness,"Dictionary of Psychological Medicine), "local titillation of the skin, though in parts remote from the reproductive organs, plainly acts indirectly upon them as a stimulus. Thus, Harvey records that, by stroking the back of a favorite parrot (which he had possessed for years and supposed to be a male), he not only gave the bird gratification,—which was the sole intention of the illustrious physiologist,—but also caused it to reveal its sex by laying an egg."

The sexual significance of tickling is very clearly indicated by the fact that the general ticklishness of the body, which is so marked in children and in young girls, greatly diminishes, as a rule, after sexual relationships have been established. Dr. Gina Lombroso, who investigated the cutaneous reflexes, found that both the abdominal and plantar reflexes, which are well marked in childhood and in young people between the ages of 15 and 18, were much diminished in older persons, and to a greater extent in women than in men, to a greater extent in the abdominal region than on the soles of the feet;[16]her results do not directly show the influence of sexual relationship, but they have an indirect bearing which is worth noting.

The difference in ticklishness between the unmarried woman and the married woman corresponds to their difference in degree of modesty. Both modesty and ticklishness may be said to be characters which are no longer needed. From this point of view the general ticklishness of the skin is a kind of body modesty. It is so even apart from any sexual significance of tickling, and Louis Robinson has pointed out that in young apes, puppies, and other like animals the most ticklish regions correspond to the most vulnerable spots in a fight, and that consequently in the mock fights of early life skill in defending these spots is attained.

In Iceland, according to Margarethe Filhés (as quoted by Max Bartels,Zeitschrift für Ethnologie, 1900, ht. 2-3, p. 57), it may be known whether a youth is pure or a maid is intact by their susceptibility to tickling. It is considered a bad sign if that is lost.I am indebted to a medical correspondent for the following communication: "Married women have told me that they find that after marriage they are not ticklish under the arms or on the breasts, though before marriage any tickling or touching in these regions, especially by a man, would make them jump or get hysterical or 'queer,' as they call it. Before coitus the sexual energy seems to be dissipated along all the nerve-channels and especially along the secondary sexual routes,—the breasts, nape of neck, eyebrows, lips, cheeks, armpits, and hair thereon, etc.,—but after marriage the surplus energy is diverted from these secondary channels, and response to tickling is diminished. I have often noted in insane cases, especially mania in adolescent girls, that they are excessively ticklish. Again, in ordinary routine practice I have observed that, though married women show no ticklishness during auscultation and percussion of the chest, this is by no means always so in young girls. Perhaps ticklishness in virgins is Nature's self-protection against rape and sexual advances, and the young girl instinctively wishing to hide the armpits, breasts, and other ticklish regions, tucks herself up to prevent these parts being touched. The married woman, being in love with a man, does not shut up these parts, as she reciprocates the advances that he makes; she no longer requires ticklishness as a protection against sexual aggression."

In Iceland, according to Margarethe Filhés (as quoted by Max Bartels,Zeitschrift für Ethnologie, 1900, ht. 2-3, p. 57), it may be known whether a youth is pure or a maid is intact by their susceptibility to tickling. It is considered a bad sign if that is lost.

I am indebted to a medical correspondent for the following communication: "Married women have told me that they find that after marriage they are not ticklish under the arms or on the breasts, though before marriage any tickling or touching in these regions, especially by a man, would make them jump or get hysterical or 'queer,' as they call it. Before coitus the sexual energy seems to be dissipated along all the nerve-channels and especially along the secondary sexual routes,—the breasts, nape of neck, eyebrows, lips, cheeks, armpits, and hair thereon, etc.,—but after marriage the surplus energy is diverted from these secondary channels, and response to tickling is diminished. I have often noted in insane cases, especially mania in adolescent girls, that they are excessively ticklish. Again, in ordinary routine practice I have observed that, though married women show no ticklishness during auscultation and percussion of the chest, this is by no means always so in young girls. Perhaps ticklishness in virgins is Nature's self-protection against rape and sexual advances, and the young girl instinctively wishing to hide the armpits, breasts, and other ticklish regions, tucks herself up to prevent these parts being touched. The married woman, being in love with a man, does not shut up these parts, as she reciprocates the advances that he makes; she no longer requires ticklishness as a protection against sexual aggression."

[5]

Alrutz's views are summarized inPsychological Review, Sept., 1901.

Alrutz's views are summarized inPsychological Review, Sept., 1901.

[6]

Die Spiele der Menschen, 1899, p. 206.

Die Spiele der Menschen, 1899, p. 206.

[7]

L. Robinson, art. "Ticklishness," Tuke'sDictionary of Psychological Medicine.

L. Robinson, art. "Ticklishness," Tuke'sDictionary of Psychological Medicine.

[8]

Stanley Hall and Allin, "Tickling and Laughter,"American Journal of Psychology, October, 1897.

Stanley Hall and Allin, "Tickling and Laughter,"American Journal of Psychology, October, 1897.

[9]

H. M. Stanley, "Remarks on Tickling and Laughter,"American Journal of Psychology, vol. ix, January, 1898.

H. M. Stanley, "Remarks on Tickling and Laughter,"American Journal of Psychology, vol. ix, January, 1898.

[10]

Simpson, "On the Attitude of the Fœtus in Utero,"Obstetric Memoirs, 1856, vol. ii.

Simpson, "On the Attitude of the Fœtus in Utero,"Obstetric Memoirs, 1856, vol. ii.

[11]

Erasmus Darwin,Zoönomia, Sect. XVII, 4.

Erasmus Darwin,Zoönomia, Sect. XVII, 4.

[12]

Hyades and Deniker,Mission Scientifique du Cap Horn, vol. vii. p. 296.

Hyades and Deniker,Mission Scientifique du Cap Horn, vol. vii. p. 296.

[13]

Such an interpretation is supported by the arguments of W. McDougall ("The Theory of Laughter,"Nature, February 5, 1903), who contends, without any reference to the sexual field, that one of the objects of laughter is automatically to "disperse our attention."

Such an interpretation is supported by the arguments of W. McDougall ("The Theory of Laughter,"Nature, February 5, 1903), who contends, without any reference to the sexual field, that one of the objects of laughter is automatically to "disperse our attention."

[14]

Even the structure of the vaginal mucous membrane, it may be noted, is analogous to that of the skin. D. Berry Hart, "Note on the Development of the Clitoris, Vagina, and Hymen,"Transactions of the Edinburgh Obstetrical Society, vol. xxi, 1896.

Even the structure of the vaginal mucous membrane, it may be noted, is analogous to that of the skin. D. Berry Hart, "Note on the Development of the Clitoris, Vagina, and Hymen,"Transactions of the Edinburgh Obstetrical Society, vol. xxi, 1896.

[15]

W. H. B. Stoddart, "Anæsthesia in the Insane,"Journal of Mental Science, October, 1899.

W. H. B. Stoddart, "Anæsthesia in the Insane,"Journal of Mental Science, October, 1899.

[16]

Gina Lombroso, "Sur les Réflexes Cutanés," International Congress of Criminal Anthropology, Amsterdam,Comptes Rendus, p. 295.

Gina Lombroso, "Sur les Réflexes Cutanés," International Congress of Criminal Anthropology, Amsterdam,Comptes Rendus, p. 295.

The Secondary Sexual Skin Centres—Orificial Contacts—Cunnilingus and Fellatio—The Kiss—The Nipples—The Sympathy of the Breasts with the Primary Sexual Centres—This Connection Operative both through the Nerves and through the Blood—The Influence of Lactation on the Sexual Centres—Suckling and Sexual Emotion—The Significance of the Association between Suckling and Sexual Emotion—This Association as a Cause of Sexual Perversity.

The Secondary Sexual Skin Centres—Orificial Contacts—Cunnilingus and Fellatio—The Kiss—The Nipples—The Sympathy of the Breasts with the Primary Sexual Centres—This Connection Operative both through the Nerves and through the Blood—The Influence of Lactation on the Sexual Centres—Suckling and Sexual Emotion—The Significance of the Association between Suckling and Sexual Emotion—This Association as a Cause of Sexual Perversity.

We have seen that the skin generally has a high degree of sensibility, which frequently tends to be in more or less definite association with the sexual centres. We have seen also that the central and specific sexual sensation, the sexual embrace itself, is, in large measure, a specialized kind of skin reflex. Between the generalized skin sensations and the great primary sexual centre of sensation there are certain secondary sexual centres which, on account of their importance, may here be briefly considered.

These secondary centres have in common the fact that they always involve the entrances and the exits of the body—the regions, that is, where skin merges into mucous membrane, and where, in the course of evolution, tactile sensibility has become highly refined. It may, indeed, be said generally of these frontier regions of the body that their contact with the same or a similar frontier region in another person of opposite sex, under conditions otherwise favorable to tumescence, will tend to produce a minimum and even sometimes a maximum degree of sexual excitation. Contact of these regions with each other or with the sexual region itself so closely simulates the central sexual reflex that channels are set up for the same nervous energy and secondary sexual centres are constituted.

It is important to remember that the phenomena we are here concerned with are essentially normal. Many of them are commonly spoken of as perversions. In so far, however, as they are aids to tumescence they must be regarded as comingwithin the range of normal variation. They may be considered unæsthetic, but that is another matter. It has, moreover, to be remembered that æsthetic values are changed under the influence of sexual emotion; from the lover's point of view many things are beautiful which are unbeautiful from the point of view of him who is not a lover, and the greater the degree to which the lover is swayed by his passion the greater the extent to which his normal æsthetic standard is liable to be modified. A broad consideration of the phenomena among civilized and uncivilized peoples amply suffices to show the fallacy of the tendency, so common among unscientific writers on these subjects, to introduce normal æsthetic standards into the sexual sphere. From the normal standpoint of ordinary daily life, indeed, the whole process of sex is unæsthetic, except the earlier stages of tumescence.[17]

So long as they constitute a part of the phase of tumescence, the utilization of the sexual excitations obtainable through these channels must be considered within the normal range of variation, as we may observe, indeed, among many animals. When, however, such contacts of the orifices of the body, other than those of the male and female sexual organs proper, are used to procure not merely tumescence, but detumescence, they become, in the strict and technical sense, perversions. They are perversions in exactly the same sense as are the methods of intercourse which involve the use of checks to prevent fecundation. The æsthetic question, however, remains the same as if we were dealing with tumescence. It is necessary that this should be pointed out clearly, even at the risk of misapprehension, as confusions are here very common.

The essentially sexual character of the sensitivity of the orificial contacts is shown by the fact that it may sometimes be accidentally developed even in early childhood. This is well illustrated in a case recordedby Féré. A little girl of 4, of nervous temperament and liable to fits of anger in which she would roll on the ground and tear her clothes, once ran out into the garden in such a fit of temper and threw herself on the lawn in a half-naked condition. As she lay there two dogs with whom she was accustomed to play came up and began to lick the uncovered parts of the body. It so happened that as one dog licked her mouth the other licked her sexual parts. She experienced a shock of intense sensation which she could never forget and never describe, accompanied by a delicious tension of the sexual organs. She rose and ran away with a feeling of shame, though she could not comprehend what had happened. The impression thus made was so profound that it persisted throughout life and served as the point of departure of sexual perversions, while the contact of a dog's tongue with her mouth alone afterward sufficed to evoke sexual pleasure. (Féré,Archives de Neurologie, 1903, No. 90.)I do not purpose to discuss here eithercunnilingus(the apposition of the mouth to the female pudendum) orfellatio(the apposition of the mouth to the male organ), the agent in the former case being, in normal heterosexual relationships, a man, in the latter a woman; they are not purely tactile phenomena, but involve various other physical and psychic elements.Cunnilinguswas a very familiar manifestation in classic times, as shown by frequent and mostly very contemptuous references in Aristophanes, Juvenal, and many other Greek and Roman writers; the Greeks regarded it as a Phœnician practice, just as it is now commonly considered French; it tends to be especially prevalent at all periods of high civilization.Fellatiohas also been equally well known, in both ancient and modern times, especially as practiced by inverted men. It may be accepted that bothcunnilingusandfellatio, as practiced by either sex, are liable to occur among healthy or morbid persons, in heterosexual or homosexual relationships. They have little psychological significance, except to the extent that when practiced to the exclusion of normal sexual relationships they become perversions, and as such tend to be associated with various degenerative conditions, although such associations are not invariable.The essentially normal character ofcunnilingusandfellatio, when occurring as incidents in the process of tumescence, is shown by the fact that they are practiced by many animals. This is the case, for instance, among dogs. Moll points out that not infrequently the bitch, while under the dog, but before intromission, will change her position to lick the dog's penis—apparently from an instinctive impulse to heighten her own and his excitement—and then return to the normal position, whilecunnilingusis of constant occurrence among animals, and on account of its frequency among dogs was called by the Greeks σκὑλαξ (Rosenbaum,Geschichte der Lustseuche im Altertume, fifth edition, pp. 260-278; also notes in Moll,Untersuchungen über pieLibido Sexualis, Bd. I, pp. 134, 369; and Bloch,Beiträge zur Ætiologie der Psychopathia Sexualis, Teil II, pp. 216et seq.)The occurrence ofcunnilingusas a sexual episode of tumescence among lower human races is well illustrated by a practice of the natives of the Caroline Islands (as recorded by Kubary in his ethnographic study of this people and quoted by Ploss and Bartels,Das Weib, vol. i). It is here customary for a man to place a piece of fish between the labia, while he stimulates the latter by his tongue and teeth until under stress of sexual excitement the woman urinates; this is regarded as an indication that the proper moment for intercourse has arrived. Such a practice rests on physiologically sound facts whatever may be thought of it from an æsthetic standpoint.The contrast between the normal æsthetic standpoint in this matter and the lover's is well illustrated by the following quotations: Dr. A. B. Holder, in the course of his description of the American Indianboté, remarks, concerningfellatio: "Of all the many varieties of sexual perversion, this, it seems to me, is the most debased that could be conceived of." On the other hand, in a communication from a writer and scholar of high intellectual distinction occurs the statement: "I affirm that, of all sexual acts,fellatiois most an affair of imagination and sympathy." It must be pointed out that there is no contradiction in these two statements, and that each is justified, according as we take the point of view of the ordinary onlooker or of the impassioned lover eager to give a final proof of his or her devotion. It must be added that from a scientific point of view we are not entitled to take either side.

The essentially sexual character of the sensitivity of the orificial contacts is shown by the fact that it may sometimes be accidentally developed even in early childhood. This is well illustrated in a case recordedby Féré. A little girl of 4, of nervous temperament and liable to fits of anger in which she would roll on the ground and tear her clothes, once ran out into the garden in such a fit of temper and threw herself on the lawn in a half-naked condition. As she lay there two dogs with whom she was accustomed to play came up and began to lick the uncovered parts of the body. It so happened that as one dog licked her mouth the other licked her sexual parts. She experienced a shock of intense sensation which she could never forget and never describe, accompanied by a delicious tension of the sexual organs. She rose and ran away with a feeling of shame, though she could not comprehend what had happened. The impression thus made was so profound that it persisted throughout life and served as the point of departure of sexual perversions, while the contact of a dog's tongue with her mouth alone afterward sufficed to evoke sexual pleasure. (Féré,Archives de Neurologie, 1903, No. 90.)

I do not purpose to discuss here eithercunnilingus(the apposition of the mouth to the female pudendum) orfellatio(the apposition of the mouth to the male organ), the agent in the former case being, in normal heterosexual relationships, a man, in the latter a woman; they are not purely tactile phenomena, but involve various other physical and psychic elements.Cunnilinguswas a very familiar manifestation in classic times, as shown by frequent and mostly very contemptuous references in Aristophanes, Juvenal, and many other Greek and Roman writers; the Greeks regarded it as a Phœnician practice, just as it is now commonly considered French; it tends to be especially prevalent at all periods of high civilization.Fellatiohas also been equally well known, in both ancient and modern times, especially as practiced by inverted men. It may be accepted that bothcunnilingusandfellatio, as practiced by either sex, are liable to occur among healthy or morbid persons, in heterosexual or homosexual relationships. They have little psychological significance, except to the extent that when practiced to the exclusion of normal sexual relationships they become perversions, and as such tend to be associated with various degenerative conditions, although such associations are not invariable.

The essentially normal character ofcunnilingusandfellatio, when occurring as incidents in the process of tumescence, is shown by the fact that they are practiced by many animals. This is the case, for instance, among dogs. Moll points out that not infrequently the bitch, while under the dog, but before intromission, will change her position to lick the dog's penis—apparently from an instinctive impulse to heighten her own and his excitement—and then return to the normal position, whilecunnilingusis of constant occurrence among animals, and on account of its frequency among dogs was called by the Greeks σκὑλαξ (Rosenbaum,Geschichte der Lustseuche im Altertume, fifth edition, pp. 260-278; also notes in Moll,Untersuchungen über pieLibido Sexualis, Bd. I, pp. 134, 369; and Bloch,Beiträge zur Ætiologie der Psychopathia Sexualis, Teil II, pp. 216et seq.)

The occurrence ofcunnilingusas a sexual episode of tumescence among lower human races is well illustrated by a practice of the natives of the Caroline Islands (as recorded by Kubary in his ethnographic study of this people and quoted by Ploss and Bartels,Das Weib, vol. i). It is here customary for a man to place a piece of fish between the labia, while he stimulates the latter by his tongue and teeth until under stress of sexual excitement the woman urinates; this is regarded as an indication that the proper moment for intercourse has arrived. Such a practice rests on physiologically sound facts whatever may be thought of it from an æsthetic standpoint.

The contrast between the normal æsthetic standpoint in this matter and the lover's is well illustrated by the following quotations: Dr. A. B. Holder, in the course of his description of the American Indianboté, remarks, concerningfellatio: "Of all the many varieties of sexual perversion, this, it seems to me, is the most debased that could be conceived of." On the other hand, in a communication from a writer and scholar of high intellectual distinction occurs the statement: "I affirm that, of all sexual acts,fellatiois most an affair of imagination and sympathy." It must be pointed out that there is no contradiction in these two statements, and that each is justified, according as we take the point of view of the ordinary onlooker or of the impassioned lover eager to give a final proof of his or her devotion. It must be added that from a scientific point of view we are not entitled to take either side.

Of the whole of this group of phenomena, the most typical and the most widespread example is certainly the kiss. We have in the lips a highly sensitive frontier region between skin and mucous membrane, in many respects analogous to the vulvo-vaginal orifice, and reinforcible, moreover, by the active movements of the still more highly sensitive tongue. Close and prolonged contact of these regions, therefore, under conditions favorable to tumescence sets up a powerful current of nervous stimulation. After those contacts in which the sexual regions themselves take a direct part, there is certainly no such channel for directing nervous force into the sexual sphere as the kiss. This is nowhere so well recognized as in France, where a young girl's lips are religiously kept for her lover, to such an extent, indeed, that young girls sometimes come to believe that the whole physical side of love is comprehended in a kiss on the mouth; so highly intelligent a woman as Madam Adamhas described the agony she felt as a girl when kissed on the lips by a man, owing to the conviction that she had thereby lost her virtue. Although the lips occupy this highly important position as a secondary sexual focus in the sphere of touch, the kiss is—unlikecunnilingusandfellatio—confined to man and, indeed, to a large extent, to civilized man. It is the outcome of a compound evolution which had its beginning outside the sphere of touch, and it would therefore be out of place to deal with the interesting question of its development in this place. It will be discussed elsewhere.[18]

There is yet another orificial frontier region which is a highly important tactile sexual focus: the nipple. The breasts raise, indeed, several interesting questions in their intimate connection with the sexual sphere and it may be worth while to consider them at this point.

The breasts have from the present point of view this special significance among the sexual centres that they primarily exist, not for the contact of the lover, but the contact of the child. This is doubtless, indeed, the fundamental fact on which all the touch contacts we are here concerned with have grown up. The sexual sensitivity of the lover's lips to orificial contacts has been developed from the sensitivity of the infant's lips to contact with his mother's nipple. It is on the ground of that evolution that we are bound to consider here the precise position of the breasts as a sexual centre.

As the great secreting organs of milk, the function of the breasts must begin immediately the child is cut off from the nutrition derived from direct contact with his mother's blood. It is therefore essential that the connection between the sexual organs proper, more especially the womb, and the breasts should be exceedingly intimate, so that the breasts may be in a condition to respond adequately to the demand of the child's sucking lips at the earliest moment after birth. As a matter of fact, this connection is very intimate, so intimate that it takes place in two totally distinct ways—by the nervous system and by the blood.

The breasts of young girls sometimes become tender at puberty in sympathy with the evolution of the sexual organs, although the swelling of the breasts at this period is not normally a glandular process. At the recurring periods of menstruation, again, sensations in the breasts are not uncommon.It is not, however, until impregnation occurs that really decisive changes take place in the breasts. "As soon as the ovum is impregnated, that is to say within a few days," as W. D. A. Griffith states it ("The Diagnosis of Pregnancy,"British Medical Journal, April 11, 1903), "the changes begin to occur in the breast, changes which are just as well worked out as are the changes in the uterus and the vagina, which, from the commencement of pregnancy, prepare for the labor which ought to follow nine months afterward. These are changes in the direction of marked activity of function. An organ which was previously quite passive, without activity of circulation and the effects of active circulation, begins to grow and continues to grow in activity and size as pregnancy progresses."The association between breasts and womb is so obvious that it has not escaped many savage peoples, who are often, indeed, excellent observers. Among one primitive people at least the activity of the breast at impregnation seems to be clearly recognized. The Sinangolo of British New Guinea, says Seligmann (Journal of the Anthropological Institute, July-December, 1902, p. 298) believe that conception takes place in the breasts; on this account they hold that coitus should never take place before the child is weaned or he might imbibe semen with the milk.It is natural to assume that this connection between the activity of the womb and the glandular activity of the breasts is a nervous connection, by means of the spinal cord, and such a connection certainly exists and plays a very important part in the stimulating action of the breasts on the sexual organs. But that there is a more direct channel of communication even than the nervous system is shown by the fact that the secretion of milk will take place at parturition, even when the nervous connection has been destroyed. Mironoff found that, when the mammary gland is completely separated from the central nervous system, secretion, though slightly diminished, still continued. In two goats he cut the nerves shortly before parturition and after birth the breasts still swelled and functioned normally (Archives des Sciences Biologiques, St. Petersburg, 1895, summarized inL'Année Biologique; 1895, p. 329). Ribbert, again, cut out the mammary gland of a young rabbit and transplanted it into the ear; five months after the rabbit bore young and the gland secreted milk freely. The case has been reported of a woman whose spinal cord was destroyed by an accident at the level of the fifth and sixth dorsal vertebræ,yet lactation was perfectly normal (British Medical Journal, August 5, 1899, p. 374). We are driven to suppose that there is some chemical change in the blood, some internal secretion from the uterus or the ovaries, which acts as a direct stimulant to the breasts. (See a comprehensive discussion of the phenomena of the connection between the breasts and sexual organs, though the conclusions are not unassailable, by Temesvary,Journal of Obstetrics and Gynæcology of the British Empire, June, 1903). That this hypothetical secretion starts from the womb rather than the ovaries seems to be indicated by the fact that removal of both ovaries during pregnancy will not suffice to prevent lactation. In favor of the ovaries, see Beatson,Lancet, July, 1896; in favor of the uterus, Armand Routh, "On the Interaction between the Ovaries and the Mammary Glands,"British Medical Journal, September 30, 1899.

The breasts of young girls sometimes become tender at puberty in sympathy with the evolution of the sexual organs, although the swelling of the breasts at this period is not normally a glandular process. At the recurring periods of menstruation, again, sensations in the breasts are not uncommon.

It is not, however, until impregnation occurs that really decisive changes take place in the breasts. "As soon as the ovum is impregnated, that is to say within a few days," as W. D. A. Griffith states it ("The Diagnosis of Pregnancy,"British Medical Journal, April 11, 1903), "the changes begin to occur in the breast, changes which are just as well worked out as are the changes in the uterus and the vagina, which, from the commencement of pregnancy, prepare for the labor which ought to follow nine months afterward. These are changes in the direction of marked activity of function. An organ which was previously quite passive, without activity of circulation and the effects of active circulation, begins to grow and continues to grow in activity and size as pregnancy progresses."

The association between breasts and womb is so obvious that it has not escaped many savage peoples, who are often, indeed, excellent observers. Among one primitive people at least the activity of the breast at impregnation seems to be clearly recognized. The Sinangolo of British New Guinea, says Seligmann (Journal of the Anthropological Institute, July-December, 1902, p. 298) believe that conception takes place in the breasts; on this account they hold that coitus should never take place before the child is weaned or he might imbibe semen with the milk.

It is natural to assume that this connection between the activity of the womb and the glandular activity of the breasts is a nervous connection, by means of the spinal cord, and such a connection certainly exists and plays a very important part in the stimulating action of the breasts on the sexual organs. But that there is a more direct channel of communication even than the nervous system is shown by the fact that the secretion of milk will take place at parturition, even when the nervous connection has been destroyed. Mironoff found that, when the mammary gland is completely separated from the central nervous system, secretion, though slightly diminished, still continued. In two goats he cut the nerves shortly before parturition and after birth the breasts still swelled and functioned normally (Archives des Sciences Biologiques, St. Petersburg, 1895, summarized inL'Année Biologique; 1895, p. 329). Ribbert, again, cut out the mammary gland of a young rabbit and transplanted it into the ear; five months after the rabbit bore young and the gland secreted milk freely. The case has been reported of a woman whose spinal cord was destroyed by an accident at the level of the fifth and sixth dorsal vertebræ,yet lactation was perfectly normal (British Medical Journal, August 5, 1899, p. 374). We are driven to suppose that there is some chemical change in the blood, some internal secretion from the uterus or the ovaries, which acts as a direct stimulant to the breasts. (See a comprehensive discussion of the phenomena of the connection between the breasts and sexual organs, though the conclusions are not unassailable, by Temesvary,Journal of Obstetrics and Gynæcology of the British Empire, June, 1903). That this hypothetical secretion starts from the womb rather than the ovaries seems to be indicated by the fact that removal of both ovaries during pregnancy will not suffice to prevent lactation. In favor of the ovaries, see Beatson,Lancet, July, 1896; in favor of the uterus, Armand Routh, "On the Interaction between the Ovaries and the Mammary Glands,"British Medical Journal, September 30, 1899.

While, however, the communications from the sexual organs to the breast are of a complex and at present ill understood character, the communication from the breasts to the sexual organs is without doubt mainly and chiefly nervous. When the child is put to the breast after birth the suction of the nipple causes a reflex contraction of the womb, and it is held by many, though not all, authorities that in a woman who does not suckle her child there is some risk that the womb will not return to its normal involuted size. It has also been asserted that to put a child to the breast during the early months of pregnancy causes so great a degree of uterine contraction that abortion may result.

Freund found in Germany that stimulation of the nipples by an electrical cupping apparatus brought about contraction of the pregnant uterus. At an earlier period it was recommended to irritate the nipple in order to excite the uterus to parturient action. Simpson, while pointing out that this was scarcely adequate to produce the effect desired, thought that placing a child to the breast after labor had begun might increase uterine action. (J. Y. Simpson,Obstetric Memoirs, vol. i, p. 836; also Féré,L'Instinct Sexuel, second edition, p. 132).The influence of lactation over the womb in preventing the return of menstruation during its continuance is well known. According to Remfry's investigation of 900 cases in England, in 57 per cent. of cases there is no menstruation during lactation. (L. Remfry, in paper read before Obstetrical Society of London, summarized in theBritish Medical Journal, January 11, 1896, p. 86). Bendix, in Germany, found among140 cases that in about 40 per cent. there was no menstruation during lactation (paper read before Düsseldorf meeting of the Society of German Naturalists and Physicians, 1899). When the child is not suckled menstruation tends to reappear about six months after parturition.It is possible that the divergent opinions of authorities concerning the necessarily favorable influence of lactation in promoting the return of the womb to its normal size may be due to a confusion of two distinct influences: the reflex action of the nipple on the womb and the effects of prolonged glandular secretion of the breasts in debilitated persons. The act of suckling undoubtedly tends to promote uterine contraction, and in healthy women during lactation the womb may even (according to Vineberg) be temporarily reduced to a smaller size than before impregnation, thus producing what is known as "lactation atrophy." In debilitated women, however, the strain of milk-production may lead to general lack of muscular tone, and involution of the womb thus be hindered rather than aided by lactation.

Freund found in Germany that stimulation of the nipples by an electrical cupping apparatus brought about contraction of the pregnant uterus. At an earlier period it was recommended to irritate the nipple in order to excite the uterus to parturient action. Simpson, while pointing out that this was scarcely adequate to produce the effect desired, thought that placing a child to the breast after labor had begun might increase uterine action. (J. Y. Simpson,Obstetric Memoirs, vol. i, p. 836; also Féré,L'Instinct Sexuel, second edition, p. 132).

The influence of lactation over the womb in preventing the return of menstruation during its continuance is well known. According to Remfry's investigation of 900 cases in England, in 57 per cent. of cases there is no menstruation during lactation. (L. Remfry, in paper read before Obstetrical Society of London, summarized in theBritish Medical Journal, January 11, 1896, p. 86). Bendix, in Germany, found among140 cases that in about 40 per cent. there was no menstruation during lactation (paper read before Düsseldorf meeting of the Society of German Naturalists and Physicians, 1899). When the child is not suckled menstruation tends to reappear about six months after parturition.

It is possible that the divergent opinions of authorities concerning the necessarily favorable influence of lactation in promoting the return of the womb to its normal size may be due to a confusion of two distinct influences: the reflex action of the nipple on the womb and the effects of prolonged glandular secretion of the breasts in debilitated persons. The act of suckling undoubtedly tends to promote uterine contraction, and in healthy women during lactation the womb may even (according to Vineberg) be temporarily reduced to a smaller size than before impregnation, thus producing what is known as "lactation atrophy." In debilitated women, however, the strain of milk-production may lead to general lack of muscular tone, and involution of the womb thus be hindered rather than aided by lactation.

On the objective side, then, the nipple is to be regarded as an erectile organ, richly supplied with nerves and vessels, which, under the stimulation of the infant's lips—or any similar compression, and even under the influence of emotion or cold,—becomes firm and projects, mainly as a result of muscular contraction; for, unlike the penis and the clitoris, the nipple contains no true erectile tissue and little capacity for vascular engorgement.[19]We must then suppose that an impetus tends to be transmitted through the spinal cord to the sexual organs, setting up a greater or less degree of nervous and muscular excitement with uterine contraction. These being the objective manifestations, what manifestations are to be noted on the subjective side?

It is a remarkable proof of the general indifference with which in Europe even the fairly constant and prominent characteristics of the psychology of women have been treated until recent times that, so far as I am aware,—though I have made no special research to this end,—no one before the end of the eighteenth century had recorded the fact that the act of suckling tends to produce in women voluptuous sexual emotions.Cabanis in 1802, in the memoir on "Influence des Sexes" in hisRapports du Physique et du Moral de l'Homme, wrote that several suckling women had told him that the child in sucking the breast made them experience a vivid sensation of pleasure, shared in some degree by the sexual organs. There can be no doubt that in healthy suckling women this phenomenon is exceedingly common, though in the absence of any methodical and precise investigation it cannot be affirmed that it is experienced by every woman in some degree, and it is highly probable that this is not the case. One lady, perfectly normal, states that she has had stronger sexual feelings in suckling her children than she has ever experienced with her husband, but that so far as possible she has tried to repress them, as she regards them as brutish under these circumstances. Many other women state generally that suckling is the most delicious physical feeling they have ever experienced. In most cases, however, it does not appear to lead to a desire for intercourse, and some of those who make this statement have no desire for coitus during lactation, though they may have strong sexual needs at other times. It is probable that this corresponds to the normal condition, and that the voluptuous sensations aroused by suckling are adequately gratified by the child. It may be added that there are probably many women who could say, with a lady quoted by Féré,[20]that the only real pleasures of sex they have ever known are those derived from their suckling infants.

It is not difficult to see why this normal association of sexual emotion with suckling should have come about. It is essential for the preservation of the lives of young mammals that the mothers should have an adequate motive in pleasurable sensation for enduring the trouble of suckling. The most obvious method for obtaining the necessary degree of pleasurable sensation lay in utilizing the reservoir of sexual emotion, with which channels of communication might already be said to be open through the action of the sexual organs on the breastsduring pregnancy. The voluptuous element in suckling may thus be called a merciful provision of Nature for securing the maintenance of the child.


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