chapter I

showed that in childhood the sexes are differentiated both physically and mentally, altogether apart from the genital organs and the sexual impulse; and I pointed out that games in

## particular afforded indications of mental sexual differentiation. Many

games, indeed, may even be regarded as direct manifestations of the sexual impulse, and I must therefore now return to the consideration of this topic; but I shall confine myself to certain phenomena observable in the animal world, since the games of animals are, in this connexion, so much simpler than those of children. Play constitutes a major part of the activities of young animals; think, for instance, of a kitten playing with a hanging tassel or with a ball, of puppies chasing one another, and of young birds playing with fluttering wings. The games of young animals often exhibit the character of love-games, and are in that case sexually differentiated. Various authors, and especially Brehm, have recorded numerous examples of this; I give here a few instances, quoted from Groos.[45] The young male, even before its testicles have developed, woos the female by movements, song, or other characteristic sounds. The female, also sexually immature, responds coquettishly to these advances of the male. Song, which Brehm regards as a sign of the awakening of love, makes its appearance at an age when the animal is still unfitted for the reproductive act.

"Young magpies (_Corvus pica_) address one another in September, and often in August and in October, in consecutive clucking notes, and in this way make exactly the same kind of noise that they are always heard making in early spring just before the pairing season. The young male green woodpecker (_Picus viridicanus_) sings in September as beautifully as in April, as I have myself heard more than once; the young great spotted woodpecker (_Picus major_) may even be heard at times in autumn, just as in spring, making his characteristic tapping sound as he explores hard branches in search of insects. Both varieties of creeper begin to sing before they have changed their youthful plumage; their song closely resembles that of the adult birds in spring, but the note is somewhat shorter and weaker. Similarly, both the German varieties of crossbill commonly begin to sing before losing the plumage characteristic of youth. Young house-sparrows and hedge-sparrows not only chatter and swear at one another like the full-grown birds at pairing time, but also like the latter the young birds distend their throats, let their wings droop, peck at one another, and in fact behave as exactly as they will next spring when fully grown. Young linnets also begin to sing before losing their youthful plumage, learn to sing well during the moulting season, and often continue to warble right on into the winter; in a mild winter young linnets will sing just as well as old ones. The young woodlark begins to sing as soon as its first moulting is nearly over, and not only does this when perching, but flies aloft like the adult bird in the spring-time, and soars for a long time, singing continually. Titmice all sing when still quite young, but more especially the large crested titmouse and the marsh titmouse; the notes of the young marsh titmouse are precisely similar to those with which in spring the adult bird sings to his mate; and as regards the crested titmouse, in October 1821, I observed a young male bird making advances of a most marked character to a young hen, whilst the hen drooped its wings and spread out its tail--in short, these two young birds were behaving exactly as do the full-grown birds before pairing in the spring. The young cock starling conducts itself precisely as if it wished to pair. At the beginning of September, as soon as moulting is completed, this bird returns to its birthplace, apparently in order to take possession of the nest. It perches on the tree-top, just like the full-grown bird in March, and sings almost for the whole morning. While still perching, it flaps its wings, quarrels with and chases other young starlings; sometimes it even creeps into the hollow tree or other hiding-place containing the nest in which it was hatched. The yellow wagtail sings while still in its youthful plumage, and the young birds chase one another about while in this condition; during and immediately after the first moulting, these birds produce peculiar trilling notes, identical with those with which in April the cock bird salutes his mate, and they may also be seen in the remarkable fluttering flight characteristic of many birds in the pairing season. The grey wood wren begins to sing before the first moulting, but sings more powerfully during and after moulting, right on into the month of October, singing like a full-grown bird. At the same time this bird twists the body from side to side, and moves the tail to and fro; it quarrels also with birds of its own species, and quarrels, too, with other birds, sometimes with birds as much as four times its own size. In August and September young mountain fowl and heath fowl utter love calls to each other, not, indeed, so loudly as those of the adult birds, nor in association with the characteristic movements of the body made by these latter in the spring-time, but still unmistakable love calls.... According to Hudson, many kinds of American woodpecker carry on a kind of duet, and they practise this artistic performance from the very earliest youth. On meeting, the male and female, standing close together, and facing each other, utter their clear ringing concert, one emitting loud single measured notes, while the notes of its fellow are rapid, rhythmical triplets; their voices have a joyous character, and seem to accord, thus producing a kind of harmony. This manner of singing is perhaps most perfect in the oven-bird (_Furnarius_), and it is very curious that the _young birds, when only partially fledged_, are constantly heard in the nest or oven apparently practising these duets in the intervals when the parents are absent; single measured notes, triplets, and long concluding trills are all repeated with wonderful fidelity, and in character these notes are utterly unlike the hunger cry, which is like that of other fledglings."

In such cases as those just enumerated, actual copulation is not effected; but animals still sexually immature may perform coitus-like acts, and Groos's work contains observations of these made by Seitz and others. Seitz saw an antelope six weeks old making copulatory movements. In young dogs such movements may often be observed, also in young stallions and young bulls.

The view that in such cases the movements are imitative merely is untenable, for young animals which have never had any opportunity of watching the physical manifestations of love in older ones, will nevertheless themselves exhibit such manifestations. At most it remains open to dispute whether in these cases it is still permissible to speak of love-games, as do Groos and others, or whether we should not rather speak simply of manifestations of the activity of the sexual impulse. But the dispute does not involve differences of opinion regarding matters of fact; it is purely terminological. For, in the first place, Groos himself, who regards the games of childhood as a form of training, suitable to the nature of the individual, for its subsequent activities, recognises that games are sexually differentiated. He believes that we have to do, not, as some think, with imitative processes, but with preliminary practice, subserving the purposes of self-development; and he considers that girls naturally turn to games adapted to train them for their subsequent profession of motherhood, whilst boys incline to games corresponding to their predestined activity as men. Even if we accept this theory of Groos, we are compelled to recognise a sexual element in the games of youthful animals. In addition, however, we must note the fact that Groos gives a wider extension to the concept of play than other writers, and that he regards as love-games processes which others might perhaps describe as sexual manifestations. According to Groos, caressing contact is to be regarded as playful when, in the serious intercourse between the sexes, such contact appears to be merely a preliminary activity rather than an end in itself. Here two cases are possible: in one the carrying out of the instinctive activity to its real end is prevented by incapacity or by ignorance; in the other, it is prevented by a deliberate exercise of will. The former occurs in children; the latter, often enough in adults. Whatever view we hold regarding this matter, the sexually differentiated love-games of young animals must be regarded as a manifestation of the sexual life. None the less, in sexually immature animals, just as in the case of children, sexual differentiation is not always so marked as it is in adults; and it may happen that the sexes may exchange their rôles. Cases observed by Seitz have been published by Groos and also by myself.[46] I have myself watched a young cow which repeatedly attempted to mount another young cow; I have also on several occasions seen young bitches attempt to cover dogs. To this part of our subject belongs the observation of Exner, that when dogs are playing wildly with one another one hardly ever sees a bitch among them. But if an exception should occur, the bitch is usually a young one. In animals, sexual differentiation is not complete until sexual maturity is attained, and the same is true of the human species, although, as I have shown above, children already manifest sexual differentiation in their games, their inclinations, and their general conduct.

I have thought it desirable to refer to the play of animals in this place, as well as to treat of the subject in its direct relationship to the sexual impulse. What is true of play is true also of the other interests and inclinations of the child, many of which are also associated with the sexual life; these have been described earlier, so that here I need merely allude to the matter in passing.

Hitherto I have described the sexual life of the child in so far as it is the subject of direct observation or can be recalled to memory. But it was explained at the outset that there is still another way of gaining clear knowledge of the subject, namely, by experiment; and it was shown that castration may be regarded as such an experiment. Although the reproductive capacity of the male is not developed prior to the formation of spermatozoa in the testicles, nevertheless we learn from the effects of castration that the testicles exhibit important functional activity much earlier in life. This fact was long overlooked, and its importance is even to-day largely underestimated, because we have been accustomed to regard the provision of an external secretion as the only function of the testicle. But it is now firmly established that these glands exercise influence in other ways. We know that bodily and mental development are affected by the removal of the testicles; and that the influence is greater the earlier in life the castration takes place. A number of secondary sexual characters remain undeveloped. The beard does not grow; in many instances a thick _panniculus adiposus_ is formed; there are changes in the growth of the bones; the voice remains a soprano; and the other reproductive organs are imperfectly developed, the penis and the prostate remaining comparatively small An early castration does not, of course, result in the obliteration of all differences between the male and the female; we must rather say that a part only of the typical differential characters of sex remain undeveloped. The earlier assumption, that the secretion of semen competent to effect fertilisation influenced the development of the secondary sexual characters, has of late been more and more generally abandoned. Many considerations tell against such a theory, more especially a comparison of the three following facts. First, if castration is not effected until after the formation of spermatozoa has already begun, the familiar results of this operation are either entirely wanting, or else appear to a small extent only, and are limited to a small number of the secondary sexual characters. Secondly, the results of castration are most marked when the operation is performed in early childhood. Thirdly, when castration is effected in the later years of childhood, but before the secretion of fertilising semen has taken place, the results are intermediate in degree, being much less marked than in the second class of cases, but more extensive than in the first. If the secretion of a fertilising semen were the principal factor in the development of the secondary sexual characters, we should expect the results of castration to be the same whether the operation were performed early in childhood or late so long as it was done before any spermatozoa had been formed.

The secondary sexual characters are, therefore, independent of the formation of spermatozoa, and the appearance of these characters must depend upon other processes, occurring much earlier in life. Thus, in persons who were castrated in the eighth or ninth year of life, we note the presence of definite secondary sexual characters, which are, indeed, less strongly developed than in normal persons, but which do not appear at all when the castration has been effected at a still earlier age. The varying views of different authors regarding the influence of castration in early life upon the development of the secondary sexual characters may readily be explained with reference to the individual differences that may be observed in the functional activity of the testicles in different males before the power of reproduction has been acquired. Just as in boys the capacity for reproduction, and in girls the function of menstruation, does not appear at a fixed and definite age, so also in the case of the other processes that come into being under the influence of the activity of the reproductive glands, we have to reckon with such individual differences. For this reason, in persons who have been castrated at the same age, the subsequent course of development may vary to some degree, notwithstanding the apparent identity of the determining factor in each case. In some, the pelvis, the beard, the voice, and the mental qualities, develop in normal fashion; in others, there is interference with the development of one or all of these characters. In certain cases, the bodily structure is influenced by castration at an age when the mental development is no longer affected. This explains the fact that many oriental eunuchs, in whom castration is commonly effected shortly before the seventh or eighth year of life, while they exhibit the bodily configuration characteristic of the eunuch, are nevertheless capable of experiencing heterosexual feelings, and even passionate love.

In Western countries we rarely have an opportunity of studying the full consequences of castration, for with us the operation is hardly ever performed so early in life as it is in the East; and the reports that are available concerning oriental and other foreign eunuchs are to a large extent untrustworthy. None the less, from such reports, and from accounts that have come down to us from earlier days in the West (more especially in the case of the boys who were formerly castrated in Italy for the preservation of the soprano voice), we obtain evidence amply sufficient to justify the statements made above. Even more convincing are observations made on the lower animals. For example, in horses which have been castrated at a very early age the sexual impulse remains undeveloped; but we have to contrast with this the fact that a certain number of geldings possess a well-marked sexual impulse, because in these animals, though they were gelded while still immature, the operation was performed too late. All these observations combine to justify the inference that long before spermatozoa capable of effecting fertilisation are formed in the testicles, changes occur in these glands which are of great importance in relation to the sexual life, both in the human species and in the lower animals.

We cannot speak so positively as to the truth of this in the case of the reproductive glands in women, the ovaries, because alike in the human female and in the females of the lower animals oöphorectomy is less commonly performed than is castration in the male. The literature of our subject contains few references to this matter. What little information we do possess, derived in part from travellers who have had opportunities for observation in extra-European countries, and in part from students of animal life, leads to the same conclusion as in the case of males, namely, that long before the age commonly regarded as the commencement of sexual maturity, important changes are going on in the reproductive glands.

No detailed discussion can be attempted here of the other observations there may be on record to show the existence of such sexual processes during childhood. We may merely refer, for example, to the results of the removal of one testicle before the commencement of puberty; this is followed by a compensatory hypertrophy of the other testicle--whereas removal of one testicle after the attainment of sexual maturity does not lead to any such hypertrophy of the remaining testicle, or if so, only in comparatively slight degree.

Although from the facts just stated it appears that, alike in human beings and in the lower animals, before the formation of the specific germ-cells and sperm-cells has begun in the reproductive glands of the respective sexes important processes take place in these glands, it still remains obscure what is the nature of these processes, and in what manner they influence the organism. One question complicating this problem, and one which is to-day frequently discussed, is the extent of the influence exercised by the reproductive glands on the development of the secondary sexual characters. I can here do little more than state the difficulty. Whereas it was formerly assumed that the reproductive glands exercised a direct determining influence in this direction, more recently another view has been put forward, among others by Halban.[47] According to this theory, the stimulus proceeding from the glands is protective merely, not formative, nor directly stimulating the growth of organs. In the fertilised ovum, it is supposed, the rudiment of sex already exists, likewise the rudiment of the reproductive gland, and the rudiments of the appropriate sexual characters. That is to say, the development of the secondary sexual characters is not determined by the presence of the reproductive gland; but the sex of the reproductive gland and the associated sexual characters are already determined by some common cause at the moment of fertilisation. But this theoretical controversy has no very important bearing on the problem with which we are especially concerned; and the influence of the reproductive gland upon the development of the secondary sexual characters is admitted as fully by Halban as it is by other writers, the only difference between the two views lying in the dispute whether the influence of the glands is of a formative or a protective nature. The influence exercised by the reproductive glands on the development of the secondary sexual characters can be adequately discussed, even though the precise way in which that influence is exerted remains in dispute.

As to the general nature of the influence, two chief theories have to be considered, viz., the nervous theory and the chemical theory. According to the former, we must assume that a stimulus originates in the reproductive glands, the testicles in the male, and the ovaries in the female, and that these glands excite a kind of reflex action--that is, that the stimulus passes to the central nervous system, and thence is "reflected" to the periphery, where it promotes, either the growth of

## particular parts of the body, _e.g._ the beard, or the development of

definite properties in certain organs, _e.g._ the characteristics of the male larynx or of the female mamma. It is possible that the reflected impulse stimulates trophic nerves. But it may be that in cases of early castration the state of affairs is similar to that which obtains when from earliest infancy one of the sense organs is wanting, as a result of which the corresponding portions of the central nervous system are found to undergo atrophy.[48] On this assumption, the manifest arrest of the development of certain organs which results from castration is to be regarded as the sequel of a partial atrophy of certain portions of the brain. Of late, however, the chemical theory, that the results of castration are dependent on the lack of the internal secretion of the excised glands, has gained ground at the expense of the nervous theory. The reason for this change of view is that much which was unsuspected in former years has recently been learned about the chemical activities of other glands. It suffices to allude to the function of the thyroid body. According to this chemical theory, chemical substances are prepared in the reproductive glands, and these substances exert a specific influence in promoting the development of the secondary sexual characters. The same theory has been invoked to account for the alleged ill effects of sexual abstinence, it being suggested that the reabsorption of glandular products properly destined for excretion may give rise to toxic effects.[49] If it be assumed that the testicles can secrete substances upon the influence of which the development of the secondary sexual characters depends, it is obvious that these substances have nothing to do with the spermatozoa, inasmuch as the testicles exert the influence under consideration at an age at which the formation of spermatozoa has not yet begun. The substances that act in this way must be of a different kind. As was pointed out earlier in this book (p. 19), recent researches have shown that the testicles possess a twofold activity; and some French physicians even go so far as to say that the testicle is not a single gland, but two glands. They distinguish between the gland that prepares the spermatozoa and the interstitial gland.[50] Whilst the formation of spermatozoa subserves the generative act, the function of the interstitial gland is to prepare substances which pass into the lymph or blood-stream, and give rise to the development of the secondary sexual characters. Thus, the effects of castration are due, on this theory, not to the absence of the formation of spermatozoa, but to the absence of the products of the interstitial glands. French investigators consider that the assumption that such an interstitial gland exists is justified by the results of experimental work.

Whichever theory we accept, the chemical or the nervous, both theories harmonise equally with the fact that in boys, before the formation of spermatozoa begins, processes occur in the testicles which powerfully influence the organism. Thus, we learn also from a study of the results of castration how active is the sexual life even in childhood, since thus early in life influences proceed from the reproductive glands whereby the development of the secondary sexual characters is markedly affected.

The principal sexual processes occurring in childhood have now been described. Although we have been forced to admit the fact that in the child sexual processes are much more extensive than has commonly been believed, we must, on the other hand, guard ourselves against the exaggerations of those who interpret everything in sexual terms. In the chapter on diagnosis it will be necessary to refer to these exaggerations once again.

As a rule, of course, the manifestations of the sexual life of the child increase from year to year, although not always by continuous gradations. Thus, in consequence of misdirection, sexual manifestations may arise in the child, and then, if these evil communications are cut off, such manifestations may cease. But, altogether apart from deliberate seduction, we may observe periods of more rapid and periods of less rapid sexual development, the causes of which may remain obscure. Individual cases vary to such an extent, that it is impossible to lay down a rule to which there are no exceptions. This applies equally to both components of the sexual impulse, to the phenomena of detumescence as well as to those of contrectation.

But although as we have seen, the development of the sexual life is not always by regular progression, yet on the whole the increasing intensity of sexual manifestations from the years of childhood to the termination of the period of the puberal development cannot be denied. Especially extensive are the changes occurring at the end of the second period of childhood. At this period we note more particularly the development of the outward signs of sexual maturity. In the boy, we observe the growth of the beard and the pubic hair, and a more rapid enlargement of the testicles and the other organs of reproduction. In the girl, the breasts and the pelvis assume the adult female type, and ovulation and menstruation begin. During this period, also, the mental changes are extremely marked, even though in many cases these changes may have begun considerably earlier. The internal organic changes make themselves felt also in the sphere of action. The years of adolescence in the male are characterised by an impulse to travel, to adventures, but in addition to all kinds of ideal efforts and to religious activity. The loftiest ethical ideas alternate with a self-conscious bumptiousness. A change of disposition manifests itself which is sharply contrasted with the behaviour at an earlier and a subsequent age. This is no less true of the girl. That which formerly was no more than a vague indication, now becomes a manifest quality. More and more does the feminine mode of feeling display itself. The "tom-boyishness" so often seen in girls during the second period of childhood disappears. The former tomboy has become one[51]--

"In whose orbs a shadow lies Like the dusk in evening skies,"

and we see her--

"Standing, with reluctant feet, Where the brook and river meet, Womanhood and childhood fleet!

"Gazing, with a timid glance, On the brooklet's swift advance, On the river's broad expanse!"

The considerations put forward in this chapter show us how necessary it was to explain the conception of puberty at the very outset of this work. If the period of the puberal development be understood to correspond to the development and ripening of the sexual life, we see that this development begins much earlier than is commonly assumed in books on the subject. Writers have been too ready to identify with this developmental period the appearance of certain _external_ manifestations, more especially the growth of the pubic hair in both sexes, the development of the breasts in the female, and the breaking of the voice in the male; and the appearance of certain definite outward signs--in the girl, the first menstruation, and in the boy, the first ejaculation--has usually been regarded as marking a turning-point in this development. But neither in the boy is the occurrence of the first ejaculation a proof of capacity for reproduction, or a proof that the period of the puberal development is completed; nor in the girl is the occurrence of the first menstruation, which may long precede the establishment of the far more important function of ovulation, characteristic in either of these respects. Observations made on children, accounts given by children and memories of childhood, and the results of castration (and oöphorectomy),[52] all combine to prove the occurrence of sexual processes during childhood, at least as early as the beginning of the second period of childhood. At this time of life, the psychosexual in especial often plays a great part. If, notwithstanding all these facts, anyone desires to associate the beginning or the end of the puberal development, as was formerly done, with the appearance of "the external signs of puberty," no one can prevent this usage. But the scientific investigator, the physician, the schoolmaster, and the parents, should all alike fully understand that such external processes comprise but a small part of all that constitutes pubescence. A straining of terminology may at times be permissible; but on no account must we allow currency to so disastrous an error as the belief that the sexual life of the child either begins or is completed with the appearance of these external signs. The sexual life of the child begins long before, and the puberal development is not completed till many years after, the appearance of these external signs, which by most people are erroneously regarded as typical of pubescence.

Although I have detailed a number of phenomena characteristic of the sexual life of the child, it must not be assumed that these phenomena are common to all cases, or that every individual symptom is invariably observed. As I have previously explained, numerous exceptions occur. In some instances, only one symptom is discernible; in others, another only. The commonest early manifestations of the sexual life in childhood are, as was said before, the psychosexual phenomena. _Frequently, the individual symptoms are so faintly marked that they can be detected only by a very thorough and careful examination._ I wish merely to insist upon the fact that during the years of childhood which are commonly regarded as asexual, manifestations of the sexual life can with care almost always be detected, although at times their detection is by no means easy.

In conclusion, however, it is necessary to point out that there are a certain number of children in whom up to the fourteenth year of life, and even later, manifestations of the sexual life are hardly discernible; but we have to remember that the results of castration prove, as has been shown above, that even when, in early life, the occurrence of sexual processes cannot be demonstrated, such processes are nevertheless going on. We meet with individuals in whom, even during the first years of youth, the development of the sexual life is extremely backward. There are boys of fifteen or sixteen who from time to time have an involuntary seminal emission, but who exhibit no other indications whatever of an active sexual life--neither masturbation, nor any discernible psychosexual processes. Nevertheless, in most cases of this kind, more careful observation will bring to light much, besides the occurrence of the involuntary seminal emissions, which points to an awakening of sexuality. Still, in some individuals, it is remarkable how long entire sexual innocence may persist. This is doubtless due in such cases, not to any specially rigorous natural virtue, but simply to the fact that in these cases sexual development is much slower than the average. Those concerned are thus devoid of all understanding of the sexual, just in the same way as persons born blind lack all understanding of colour. In most of the cases in which such retardation occurs, the sexual life subsequently becomes entirely normal, showing that the only abnormality was the exceptional delay in the occurrence of the various processes. I have myself seen a number of cases in which the development of the sexual life was delayed to such an extent that ejaculation during coitus was not effected until towards the end of the third decade of life, although erections, and even occasional nocturnal emissions, had occurred long before. I believe that cases of this kind are to a small extent only, if at all, the result of educational influences, and they are in no way dependent upon the so-called sexual neurasthenia; we are concerned simply with a retardation of development, dependent upon congenital predisposition.

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