It is important to remember that there are different degrees of castration, for in current language these are seldom distinguished. The Romans recognized four different degrees: 1. True _castrati_, from whom both the testicles and the penis had been removed. 2. _Spadones_, from whom the testicles only had been removed; this was the most common practice. 3. _Thlibiæ_, in whom the testicles had not been removed, but destroyed by crushing; this practice is referred to by Hippocrates. 4. _Thlasiæ_, in whom the spermatic cord had simply been cut. Millant, from whose Paris thesis (_Castration Criminelle et Maniaque_, 1902) I take these definitions, points out that it was recognized that _spadones_ remained apt for coitus if the operation was performed after puberty, a fact appreciated by many Roman ladies, _ad seouras libidinationes_, as St. Jerome remarked, while Martial (lib. iv) said of a Roman lady who sought eunuchs: "Vult futui Gallia, non parere." (See also Millant, _Les Eunuques à Travers les Ages_, 1909, and articles by Lipa Bey and Zambaco, _Sexual-Probleme_, Oct. and Dec., 1911.)
In China, Matignon, formerly physician to the French legation in Pekin, tells us that eunuchs are by no means without sexual feeling, that they seek the company of women and, he believes, gratify their sexual desires by such methods as are left open to them, for the sexual organs are entirely removed. It would seem probable that, the earlier the age at which the operation is performed, the less marked are the sexual desires, for Matignon mentions that boys castrated before the age of 10 are regarded by the Chinese as peculiarly virginal and pure.[10] At Constantinople, where the eunuchs are of negro race, castration is usually complete and performed before puberty, in order to abolish sexual potency and desire as far as possible. Even when castration is effected in infancy, sexual desire is not necessarily rendered impossible. Thus Marie has recorded the case of an insane Egyptian eunuch whose penis and scrotum were removed in infancy; yet, he had frequent and intense sexual desire with ejaculation of mucus and believed that an invisible princess touched him and aroused voluptuous sensations. Although the body had a feminine appearance, the prostate was normal and the vesiculæ seminales not atrophied.[11] It may be added that Lancaster[12] quotes the following remark, made by a resident for many years in the land, concerning Nubian eunuchs: "As far as I can judge, sex feeling exists unmodified by absence of the sexual organs. The eunuch differs from the man not in the absence of sexual passion, but only in the fact that he cannot fully gratify it. As far as he can approach a gratification of it he does so." In this connection it may be noted that (as quoted by Moll) Jäger attributes the preference of some women--noted in ancient Rome and in the East--for castrated men as due not only to the freedom from risk of impregnation in such intercourse, but also to the longer duration of erection in the castrated.
When castration is performed without removal of the penis it is said that potency remains for at least ten years afterward, and Disselhorst, who in his _Die accessorischen Geschlechtsdrüsen der Wirbelthiere_ takes the same view as has been here adopted, mentions that, according to Pelikan (_Das Skopzentum in Rüssland_), those castrated at puberty are fit for coitus long afterward. When castration is performed for surgical reasons at a later age it is still less likely to affect potency or to change the sexual feelings.[13] Guinard concludes that the sexual impulse after castration is relatively more persistent in man than in the lower animals, and is sometimes even heightened, being probably more dependent on external stimuli.[14] Except in the East, castration is more often performed on women than on men, and then the evidence as to the influence of the removal of the ovaries on the sexual emotions shows varying results. It has been found that after castration sexual desire and sexual pleasure in coitus may either remain the same, be diminished or extinguished, or be increased. By some the diminution has been attributed to autosuggestion, the woman being convinced that she can no longer be like other women; the augmentation of desire and pleasure has been supposed to be due to the removal of the dread of impregnation. We have, of course, to take into account individual peculiarities, method of life, and the state of the health.
In France Jayle ("Effets physiologiques de la Castration chez la Femme," _Revue de Gynécologie_, 1897, pp. 403-57) found that, among 33 patients in whom ovariotomy had been performed, in 18 sexual desire remained the same, in 3 it was diminished, in 8 abolished, in 3 increased; while pleasure in coitus remained the same in 17, was diminished in 1, abolished in 4, and increased in 5, in 6 cases sexual intercourse was very painful. In two other groups of cases--one in which both ovaries and uterus were removed and another in which the uterus alone was removed--the results were not notably different.
In Germany Gläveke (_Archiv für Gynäkologie_, Bd. xxxv, 1889) found that desire remained in 6 cases, was diminished in 10, and disappeared in 11, while pleasure in intercourse remained in 8, was diminished in 10, and was lost in 8. Pfister, again (_Archiv für Gynäkologie_, Bd. lvi, 1898), examined this point in 99 castrated women; he remarks that sexual desire and sexual pleasure in intercourse were usually associated, and found the former unchanged in 19 cases, decreased in 24, lost in 35, never present in 21, while the latter was unchanged in 18 cases and diminished or lost in 60. Keppler (International Medical Congress, Berlin, 1890) found that among 46 castrated women sexual feeling was in no case abolished. Adler also, who discusses this question (_Die Mangelhafte Geschlechtsempfindung des Weibes_, 1904, p. 75 et seq.), criticises Gläveke's statements and concludes that there is no strict relation between the sexual organs and the sexual feelings. Kisch, who has known several cases in which the feelings remained the same as before the operation, brings together (_The Sexual Life of Women_) varying opinions of numerous authors regarding the effects of removal of the ovaries on the sexual appetite.
In America Bloom (as quoted in _Medical Standard_, 1896, p. 121) found that in none of the cases of women investigated, in which oöphorectomy had been performed before the age of 33, was the sexual appetite entirely lost; in most of them it had not materially diminished and in a few it was intensified. There was, however, a general consensus of opinion that the normal vaginal secretion during coitus was greatly lessened. In the cases of women over 33, including also hysterectomies, a gradual lessening of sexual feeling and desire was found to occur most generally. Dr. Isabel Davenport records 2 cases (reported in _Medical Standard_, 1895, p. 346) of women between 30 and 35 years of age whose erotic tendencies were extreme; the ovaries and tubes were removed, in one case for disease, in the other with a view of removing the sexual tendencies; in neither case was there any change. Lapthorn Smith (_Medical Record_, vol. xlviii) has reported the case of an unmarried woman of 24 whose ovaries and tubes had been removed seven years previously for pain and enlargement, and the periods had disappeared for six years; she had had experience of sexual intercourse, and declared that she had never felt such extreme sexual excitement and pleasure as during coitus at the end of this time.
In England Lawson Tait and Bantock (_British Medical Journal_, October 14, 1899, p. 975) have noted that sexual passion seems sometimes to be increased even after the removal of ovaries, tubes, and uterus. Lawson Tait also stated (_British Gynæcological Journal_, Feb., 1887, p. 534) that after systematic and extensive inquiry he had not found a single instance in which, provided that sexual appetite existed before the removal of the appendages, it was abolished by that operation. A Medical Inquiry Committee appointed by the Liverpool Medical Institute (ibid., p. 617) had previously reported that a considerable number of patients stated that they had suffered a distinct loss of sexual feeling. Lawson Tait, however, throws doubts on the reliability of the Committee's results, which were based on the statements of unintelligent hospital patients.
I may quote the following remarks from a communication sent to me by an experienced physician in Australia: "No rule can be laid down in cases in which both ovaries have been extirpated. Some women say that, though formerly passionate, they have since become quite indifferent, but I am of opinion that the majority of women who have had prior sexual experience retain desire and gratification in an equal degree to that they had before operation. I know one case in which a young girl hardly 19 years old, who had been accustomed to congress for some twelve months, had trouble which necessitated the removal of the ovaries and tubes on both sides. Far from losing all her desire or gratification, both were very materially increased in intensity. Menstruation has entirely ceased, without loss of femininity in either disposition or appearance. During intercourse, I am told, there is continuous spasmodic contraction of various parts of the vagina and vulva."
The independence of the sexual impulse from the distention of the sexual glands is further indicated by the great frequency with which sexual sensations, in a faint or even strong degree, are experienced in childhood and sometimes in infancy, and by the fact that they often persist in women long after the sexual glands have ceased their functions.
In the study of auto-erotism in another volume of these _Studies_ I have brought together some of the evidence showing that even in very young children spontaneous self-induced sexual excitement, with orgasm, may occur. Indeed, from an early age sexual differences pervade the whole nervous tissue. I may here quote the remarks of an experienced gynecologist: "I venture to think," Braxton Hicks said many years ago, "that those who have much attended to children will agree with me in saying that, almost from the cradle, a difference can be seen in manner, habits of mind, and in illness, requiring variations in their treatment. The change is certainly hastened and intensified at the time of puberty; but there is, even to an average observer, a clear difference between the sexes from early infancy, gradually becoming more marked up to puberty. That sexual feelings exist [it would be better to say 'may exist'] from earliest infancy is well known, and therefore this function does not depend upon puberty, though intensified by it. Hence, may we not conclude that the progress toward development is not so abrupt as has been generally supposed?...The changes of puberty are all of them dependent on the primordial force which, gradually gathering in power, culminates in the perfection both of form and of the sexual system, primary and secondary."
There appear to have been but few systematic observations on the persistence of the sexual impulse in women after the menopause. It is regarded as a fairly frequent phenomenon by Kisch, and also by Löwenfeld (_Sexualleben und Nervenleiden_, p. 29). In America, Bloom (as quoted in _Medical Standard_, 1896), from an investigation of four hundred cases, found that in some cases the sexual impulse persisted to a very advanced age, and mentions a case of a woman of 70, twenty years past the menopause, who had been long a widow, but had recently married, and who declared that both desire and gratification were as great, if not greater, than before the menopause.
Reference may finally be made to those cases in which the sexual impulse has developed notwithstanding the absence, verified or probable, of any sexual glands at all. In such cases sexual desire and sexual gratification are sometimes even stronger than normal. Colman has reported a case in which neither ovaries nor uterus could be detected, and the vagina was too small for coitus, but pleasurable intercourse took place by the rectum and sexual desire was at times so strong as to amount almost to nymphomania. Clara Barrus has reported the case of a woman in whom there was congenital absence of uterus and ovaries, as proved subsequently by autopsy, but the sexual impulse was very strong and she had had illicit intercourse with a lover. She suffered from recurrent mania, and then masturbated shamelessly; when sane she was attractively feminine. Macnaughton-Jones describes the case of a woman of 32 with normal sexual feelings and fully developed breasts, clitoris, and labia, but no vagina or internal genitalia could be detected even under the most thorough examination. In a case of Bridgman's, again, the womb and ovaries were absent, and the vagina small, but coitus was not painful, and the voluptuous sensations were complete and sexual passion was strong. In a case of Cotterill's, the ovaries and uterus were of minute size and functionless, and the vagina was absent, but the sexual feelings were normal, and the clitoris preserved its usual sensibility. Mundé had recorded two similar cases, of which he presents photographs. In all these cases not only was the sexual impulse present in full degree, but the subjects were feminine in disposition and of normal womanly conformation; in most cases the external sexual organs were properly developed.[15] Féré (_L'Instinct sexuel_, p. 241) has sought to explain away some of these phenomena, in so far as they may be brought against the theory that the secretions and excretions of the sexual glands are the sole source of the sexual impulse. The persistence of sexual feelings after castration may be due, he argues, to the presence of the nerves in the cicatrices, just as the amputated have the illusion that the missing limb is still there. Exactly the same explanation has since been put forward by Moll, _Medizinische Klinik_, 1905, Nrs. 12 and 13. In the same way the presence of sexual feelings after the menopause may be due to similar irritation determined by degeneration during involution of the glands. The precocious appearance of the sexual impulse in childhood he would explain as due to an anomaly of development in the sexual organs. Féré makes no attempt to explain the presence of the sexual impulse in the congenital absence of the sexual glands; here, however, Mundé intervenes with the suggestion that it is possible that in most cases "an infinitesimal trace of ovary" may exist, and preserve femininity, though insufficient to produce ovulation or menstruation.
It is proper to mention these ingenious arguments. They are, however, purely hypothetical, obviously invented to support a theory. It can scarcely be said that they carry conviction. We may rather agree with Guinard that so great is the importance of reproduction that nature has multiplied the means by which preparation is made for the conjunction of the sexes and the roads by which sexual excitation may arrive. As Hirschfeld puts it, in a discussion of this subject (_Sexual-Probleme_, Feb., 1912), "Nature has several irons in the fire."
It will be seen that the conclusions we have reached indirectly involve the assumption that the spinal nervous centers, through which the sexual mechanism operates, are not sufficient to account for the whole of the phenomena of the sexual impulse. The nervous circuit tends to involve a cerebral element, which may sometimes be of dominant importance. Various investigators, from the time of Gall onward, have attempted to localize the sexual instinct centrally. Such attempts, however, cannot be said to have succeeded, although they tend to show that there is a real connection between the brain and the generative organs. Thus Ceni, of Modena, by experiments on chickens, claims to have proved the influence of the cortical centers of procreation on the faculty of generation, for he found that lesions of the cortex led to sterility corresponding in degree to the lesion; but as these results followed even independently of any disturbance of the sexual instinct, their significance is not altogether clear (Carlo Ceni, "L'Influenza dei Centri Corticali sui Fenomeni della Generazione," _Revista Sperimentale di Freniatria_, 1907, fasc. 2-3). At present, as Obici and Marchesini have well remarked, all that we can do is to assume the existence of cerebral as well as spinal sexual centers; a cerebral sexual center, in the strictest sense, remains purely hypothetical.
Although Gall's attempt to locate the sexual instinct in the cerebellum--well supported as it was by observations--is no longer considered to be tenable, his discussion of the sexual instinct was of great value, far in advance of his time, and accompanied by a mass of facts gathered from many fields. He maintained that the sexual instinct is a function of the brain, not of the sexual organs. He combated the view ruling in his day that the seat of erotic mania must be sought in the sexual organs. He fully dealt with the development of the sexual instinct in many children before maturity of the sexual glands, the prolongation of the instinct into old age, its existence in the castrated and in the congenital absence of the sexual glands; he pointed out that even with an apparently sound and normal sexual apparatus all sorts of psychic pathological deviations may yet occur. In fact, all the lines of argument I have briefly indicated in the foregoing pages--although when they were first written this fact was unknown to me--had been fully discussed by this remarkable man nearly a century ago. (The greater part of the third volume of Gall's _Sur les Fonctions du Cerveau_, in the edition of 1825, is devoted to this subject. For a good summary, sympathetic, though critical, of Gall's views on this matter, see Möbius, "Ueber Gall's Specielle Organologie," _Schmidt's Jahrbücher der Medicin_, 1900, vol. cclxvii; also _Ausgewahlte Werke_, vol. vii.)
It will be seen that the question of the nature of the sexual impulse has been slowly transformed. It is no longer a question of the formation of semen in the male, of the function of menstruation in the female. It has become largely a question of physiological chemistry. The chief parts in the drama of sex, alike on its psychic as on its physical sides, are thus supposed to be played by two mysterious protagonists, the hormones, or internal secretions, of the testes and of the ovary. Even the part played by the brain is now often regarded as chemical, the brain being considered to be a great chemical laboratory. There is a tendency, moreover, to extend the sexual sphere so as to admit the influence of internal secretions from other glands. The thymus, the adrenals, the thyroid, the pituitary, even the kidneys: it is possible that internal secretions from all these glands may combine to fill in the complete picture of sexuality as we know it in men and women.[16] The subject is, however, so complex and at present so little known that it would be hazardous, and for the present purpose it is needless, to attempt to set forth any conclusions.
It is sufficiently clear that there is on the surface a striking analogy between sexual desire and the impulse to evacuate an excretion, and that this analogy is not only seen in the frog, but extends also to the highest vertebrates. It is quite another matter, however, to assert that the sexual impulse can be adequately defined as an impulse to evacuate. To show fully the inadequate nature of this conception would require a detailed consideration of the facts of sexual life. That is, however, unnecessary. It is enough to point out certain considerations which alone suffice to invalidate this view. In the first place, it must be remarked that the trifling amount of fluid emitted in sexual intercourse is altogether out of proportion to the emotions aroused by the act and to its after-effect on the organism; the ancient dictum _omne animal post coitum triste_ may not be exact, but it is certain that the effect of coitus on the organism is far more profound than that produced by the far more extensive evacuation of the bladder or bowels. Again, this definition leaves unexplained all those elaborate preliminaries which, both in man and the lower animals, precede the sexual act, preliminaries which in civilized human beings sometimes themselves constitute a partial satisfaction to the sexual impulse. It must also be observed that, unlike the ordinary excretions, this discharge of the sexual glands is not always, or in every person, necessary at all. Moreover, the theory of evacuation at once becomes hopelessly inadequate when we apply it to women; no one will venture to claim that an adequate psychological explanation of the sexual impulse in a woman is to be found in the desire to expel a little bland mucus from the minute glands of the genital tract. We must undoubtedly reject this view of the sexual impulse. It has a certain element of truth and it permits an instructive and helpful analogy; but that is all. The sexual act presents many characters which are absent in an ordinary act of evacuation, and, on the other hand, it lacks the special characteristic of the evacuation proper, the elimination of waste material; the seminal fluid is not a waste material, and its retention is, to some extent perhaps, rather an advantage than a disadvantage to the organism.
Eduard von Hartmann long since remarked that the satisfaction of what we call the sexual instinct through an act carried out with a person of the opposite sex is a very wonderful phenomenon. It cannot be said, however, that the conception of the sexual act as a simple process of evacuation does anything to explain the wonder. We are, at most, in the same position as regards the stilling of normal sexual desire as we should be as regards the emptying of the bladder, supposing it were very difficult for either sex to effect this satisfactorily without the aid of a portion of the body of a person of the other sex acting as a catheter. In such a case our thoughts and ideals would center around persons of opposite sex, and we should court their attention and help precisely as we do now in the case of our sexual needs. Some such relationship does actually exist in the case of the suckling mother and her infant. The mother is indebted to the child for the pleasurable relief of her distended breasts; and, while in civilization more subtle pleasures and intelligent reflection render this massive physical satisfaction comparatively unessential to the act of suckling, in more primitive conditions and among animals the need of this pleasurable physical satisfaction is a real bond between the mother and her offspring. The analogy is indeed very close: the erectile nipple corresponds to the erectile penis, the eager watery mouth of the infant to the moist and throbbing vagina, the vitally albuminous milk to the vitally albuminous semen.[17] The complete mutual satisfaction, physical and psychic, of mother and child, in the transfer from one to the other of a precious organized fluid, is the one true physiological analogy to the relationship of a man and a woman at the climax of the sexual act. Even this close analogy, however, fails to cover all the facts of the sexual life.
A very different view is presented to us in the definition of the sexual instinct as a reproductive impulse, a desire for offspring. Hegar, Eulenburg, Näcke, and Löwenfeld have accepted this as, at all events, a partial definition.[18] No one, indeed, would argue that it is a complete definition, although a few writers appear to have asserted that it is so sometimes as regards the sexual impulse in women. There is, however, considerable mental confusion in the attempt to set up such a definition. If we define an instinct as an action adapted to an end which is not present to consciousness, then it is quite true that the sexual instinct is an instinct of reproduction. But we do not adequately define the sexual instinct by merely stating its ultimate object. We might as well say that the impulse by which young animals seize food is "an instinct of nutrition." The object of reproduction certainly constitutes no part of the sexual impulse whatever in any animal apart from man, and it reveals a lack of the most elementary sense of biological continuity to assert that in man so fundamental and involuntary a process can suddenly be revolutionized. That the sexual impulse is very often associated with a strong desire for offspring there can be no doubt, and in women the longing for a child--that is to say, the longing to fulfill those functions for which their bodies are constituted--may become so urgent and imperative that we may regard it as scarcely less imperative than the sexual impulse. But it is not the sexual impulse, though intimately associated with it, and though it explains it. A reproductive instinct might be found in parthenogenetic animals, but would be meaningless, because useless, in organisms propagating by sexual union. A woman may not want a lover, but may yet want a child. This merely means that her maternal instincts have been aroused, while her sexual instincts are still latent. A desire for reproduction, as soon as that desire becomes instinctive, necessarily takes on the form of the sexual impulse, for there is no other instinctive mechanism by which it can possibly express itself. A "reproductive instinct," apart from the sexual instinct and apart from the maternal instinct, cannot be admitted; it would be an absurdity. Even in women in whom the maternal instincts are strong, it may generally be observed that, although before a woman is in love, and also during the later stages of her love, the conscious desire for a child may be strong, during the time when sexual passion is at its highest the thought of offspring, under normally happy conditions, tends to recede into the background. Reproduction is the natural end and object of the sexual instinct, but the statement that it is part of the contents of the sexual impulse, or can in any way be used to define that impulse, must be dismissed as altogether inacceptable. Indeed, although the term "reproductive instinct" is frequently used, it is seldom used in a sense that we need take seriously; it is vaguely employed as a euphemism by those who wish to veil the facts of the sexual life; it is more precisely employed mainly by those who are unconsciously dominated by a superstitious repugnance to sex.
I now turn to a very much more serious and elaborate attempt to define the constitution of the sexual impulse, that of Moll. He finds that it is made up of two separate components, each of which may be looked upon as an uncontrollable impulse.[19] One of these is that by which the tension of the sexual organs is spasmodically relieved; this he calls the _impulse of detumescence_,[20] and he regards it as primary, resembling the impulse to empty a full bladder. The other impulse is the "instinct to approach, touch, and kiss another person, usually of the opposite sex"; this he terms the _impulse of contrectation_, and he includes under this head not only the tendency to general physical contact, but also the psychic inclination to become generally interested in a person of the opposite sex. Each of these primary impulses Moll regards as forming a constituent of the sexual instinct in both men and women. It seems to me undoubtedly true that these two impulses do correspond to the essential phenomena. The awkward and unsatisfactory part of Moll's analysis is the relation of the one to the other. It is true that he traces both impulses back to the sexual glands, that of detumescence directly, that of contrectation indirectly; but evidently he does not regard them as intimately related to each other; he insists on the fact that they may exist apart from each other, that they do not appear synchronously in youth: the contrectation impulse he regards as secondary; it is, he states, an indirect result of the sexual glands, "only to be understood by the developmental history of these glands and the object which they subserve"; that is to say, that it is connected with the rise of the sexual method of reproduction and the desirability of the mingling of the two sexes in procreation, while the impulse of detumescence arose before the sexual method of reproduction had appeared; thus the contrectation impulse was propagated by natural selection together with the sexual method of reproduction. The impulse of contrectation is secondary, and Moll even regards it as a secondary sexual character.
While, therefore, this analysis seems to include all the phenomena and to be worthy of very careful study as a serious and elaborate attempt to present an adequate psychological definition of the sexual impulse, it scarcely seems to me that we can accept it in precisely the form in which Moll presents it. I believe, however, that by analyzing the process a little more minutely we shall find that these two constituents of the sexual impulse are really much more intimately associated than at the first glance appears, and that we need by no means go back to the time when the sexual method of reproduction arose to explain the significance of the phenomena which Moll includes under the term contrectation.
To discover the true significance of the phenomena in men it is necessary to observe carefully the phenomena of love-making not only among men, but among animals, in which the impulse of contrectation plays a very large part, and involves an enormous expenditure of energy. Darwin was the first to present a comprehensive view of, at all events a certain group of, the phenomena of contrectation in animals; on his interpretation of those phenomena he founded his famous theory of sexual selection. We are not primarily concerned with that theory; but the facts on which Darwin based his theory lie at the very roots of our subject, and we are bound to consider their psychological significance. In the first place, since these phenomena are specially associated with Darwin's name, it may not be out of place to ask what Darwin himself considered to be their psychological significance. It is a somewhat important question, even for those who are mainly concerned with the validity of the theory which Darwin established on those facts, but so far as I know it has not hitherto been asked. I find that a careful perusal of the _Descent of Man_ reveals the presence in Darwin's mind of two quite distinct theories, neither of them fully developed, as to the psychological meaning of the facts he was collecting. The two following groups of extracts will serve to show this very conclusively: "The lower animals have a sense of beauty," he declares,