Notwithstanding the fair and logical position of the more distinguished Latin theologians, there has certainly been a widely prevalent belief in Catholic countries that pollution during sleep is a sin. In the "Parson's Tale," Chaucer makes the parson say: "Another sin appertaineth to lechery that cometh in sleeping; and the sin cometh oft to them that be maidens, and eke to them that be corrupt; and this sin men clepe pollution, that cometh in four manners;" these four manners being (1) languishing of body from rank and abundant humors, (2) infirmity, (3) surfeit of meat and drink, and (4) villainous thoughts. Four hundred years later, Madame Roland, in her _Mémoires Particulières_, presented a vivid picture of the anguish produced in an innocent girl's mind by the notion of the sinfulness of erotic dreams. She menstruated first at the age of 14. "Before this," she writes, "I had sometimes been awakened from the deepest sleep in a surprising manner. Imagination played no part; I exercised it on too many serious subjects, and my timorous conscience preserved it from amusement with other subjects, so that it could not represent what I would not allow it to seek to understand. But an extraordinary effervescence aroused my senses in the heat of repose, and, by virtue of my excellent constitution, operated by itself a purification which was as strange to me as its cause.
The first feeling which resulted was, I know not why, a sort of fear. I had observed in my _Philotée_, that we are not allowed to obtain any pleasure from our bodies except in lawful marriage. What I had experienced could be called a pleasure. I was then guilty, and in a class of offences which caused me the most shame and sorrow, since it was that which was most displeasing to the Spotless Lamb. There was great agitation in my poor heart, prayers and mortifications. How could I avoid it? For, indeed, I had not foreseen it, but at the instant when I experienced it, I had not taken the trouble to prevent it. My watchfulness became extreme. I scrupulously avoided positions which I found specially exposed me to the accident. My restlessness became so great that, at last I was able to awake before the catastrophe. When I was not in time to prevent it, I would jump out of bed, with naked feet on to the polished floor, and with crossed arms pray to the Saviour to preserve me from the wiles of the devil. I would then impose some penance on myself, and I have carried out to the letter what the prophet King probably only transmitted to us as a figure of Oriental speech, mixing ashes with my bread and watering it with my tears."
To the early Protestant mind, as illustrated by Luther, there was something diseased, though not impure, in sexual excitement during sleep; thus, in his _Table Talk_ Luther remarks that girls who have such dreams should be married at once, "taking the medicine which God has given." It is only of comparatively recent years that medical science has obtained currency for the belief that this auto-erotic process is entirely normal. Blumenbach stated that nocturnal emissions are normal.[234] Sir James Paget declared that he had never known celibate men who had not such emissions from once or twice a week to twice every three months, both extremes being within the limits of good health, while Sir Lauder Brunton considers once a fortnight or once a month about the usual frequency, at these periods the emissions often following two nights in succession. Rohleder believes that they may normally follow for several nights in succession. Hammond considers that they occur about once a fortnight.[235] Ribbing regards ten to fourteen days as the normal interval.[236] Löwenfeld puts the normal frequency at about once a week;[237] this seems to be nearer the truth as regards most fairly healthy young men. In proof of this it is only necessary to refer to the exact records of healthy young adults summarized in the study of periodicity in the present volume. It occasionally happens, however, that nocturnal emissions are entirely absent. I am acquainted with some cases. In other fairly healthy young men they seldom occur except at times of intellectual activity or of anxiety and worry.
Lately there has been some tendency for medical opinion to revert to the view of Luther, and to regard sexual excitement during sleep as a somewhat unhealthy phenomenon. Moll is a distinguished advocate of this view. Sexual excitement during sleep is the normal result of celibacy, but it is another thing to say that it is, on that account, satisfactory. We might, then, Moll remarks, maintain that nocturnal incontinence of urine is satisfactory, since the bladder is thus emptied. Yet, we take every precaution against this by insisting that the bladder shall be emptied before going to sleep. (_Libido Sexualis_, Bd. I, p. 552.) This remark is supported by the fact, to which I find that both men and women can bear witness, that sexual excitement during sleep is more fatiguing than in the waking state, though this is not an invariable rule, and it is sometimes found to be refreshing. In a similar way, Eulenburg (_Sexuale Neuropathie_, p. 55) states that nocturnal emissions are no more normal than coughing or vomiting.
Nocturnal emissions are usually, though not invariably, accompanied by dreams of a voluptuous character in which the dreamer becomes conscious in a more or less fantastic manner of the more or less intimate presence or contact of a person of the opposite sex. It would seem, as a general rule, that the more vivid and voluptuous the dream, the greater is the physical excitement and the greater also the relief experienced on awakening. Sometimes the erotic dream occurs without any emission, and not infrequently the emission takes place after the dreamer has awakened.
The widest and most comprehensive investigation of erotic dreams is that carried out by Gualino, in northern Italy, and based on inquiries among 100 normal men--doctors, teachers, lawyers, etc.--who had all had experience of the phenomenon. (L. Gualino, "Il Sogno Erotico nell' Uomo Normale," _Rivista di Psicologia_, Jan.-Feb., 1907.) Gualino shows that erotic dreams, with emissions (whether or not seminal), began somewhat earlier than the period of physical development as ascertained by Marro for youths of the same part of northern Italy. Gualino found that all his cases had had erotic dreams at the age of seventeen; Marro found 8 per cent, of youths still sexually undeveloped at that age, and while sexual development began at thirteen years, erotic dreams began at twelve. Their appearance was preceded, in most cases for some months, by erections. In 37 per cent, of the cases there had been no actual sexual experiences (either masturbation or intercourse); in 23 per cent, there had been masturbation; in the rest, some form of sexual contact. The dreams are mainly visual, tactual elements coming second, and the _dramatis persona_ is either an unknown woman (27 per cent, cases), or only known by sight (56 per cent.), and in the majority is, at all events in the beginning, an ugly or fantastic figure, becoming more attractive later in life, but never identical with the woman loved during waking life. This, as Gualino points out, accords with the general tendency for the emotions of the day to be latent in sleep. Masturbation only formed the subject of the dream in four cases. The emotional state in the pubertal stage, apart from pleasure, was anxiety (37 per cent.), desire (17 per cent.), fear (14 per cent.). In the adult stage, anxiety and fear receded to 7 per cent, and 6 per cent., respectively. Thirty-three of the subjects, as a result of sexual or general disturbances, had had nocturnal emissions without dreams; these were always found exhausting. Normally (in more than 90 per cent.) erotic dreams are the most vivid of all dreams. In no case was there knowledge of any monthly or other cyclic periodicity in the occurrence of the manifestations. In 34 per cent, of cases, they tended to occur very soon after sexual intercourse. In numerous cases they were peculiarly frequent (even three in one night) during courtship, when the young man was in the habit of kissing and caressing his betrothed, but ceased after marriage. It was not noted that position in bed or a full bladder exerted any marked influence in the occurrence of erotic dreams; repletion of the seminal vesicles is regarded as the main factor.
In Germany erotic dreams have been discussed by Volkelt (_Die Traum-Phantasie_, 1875, pp. 78-82), and especially by Löwenfeld (_Sexual-Probleme_, Oct., 1908), while in America, Stanley Hall thus summarizes the general characteristics of erotic dreams in men: "In by far the most cases, consciousness, even when the act causes full awakening from sleep, finds only scattered images, single words, gestures, and acts, many of which would perhaps normally constitute no provocation. Many times the mental activity seems to be remote and incidental, and the mind retains in the morning nothing except, perhaps, a peculiar dress pattern, the shape of a finger-nail, the back of a neck, the toss of a head, the movement of a foot, or the dressing of the hair. In such cases, these images stand out for a time with the distinctness of a cameo, and suggest that the origin of erotic fetichisms is largely to be found in sexual dreams. Very rarely is there any imagery of the organs themselves, but the tendency to irradiation is so strong as to re-enforce the suggestion of so many other phenomena in this field, that nature designs this experience to be long circuited, and that it may give a peculiar ictus to almost any experience. When waking occurs just afterward, it seems at least possible that there may be much imagery that existed, but failed to be recalled to memory, possibly because the flow of psychic impressions was over very familiar fields, and this, therefore, was forgotten, while any eruption into new or unwonted channels, stood out with distinctness. All these psychic phenomena, although very characteristic of man in his prime, are not so of the dreams of dawning puberty, which are far more vivid." (G. Stanley Hall, _Adolescence_, vol. i, p. 455.)
I may, further, quote the experience of an anonymous contributor--a healthy and chaste man between 30 and 38 years of age--to the _American Journal of Psychology_ ("Nocturnal Emissions," Jan., 1904): "Legs and breasts often figured prominently in these dreams, the other sexual parts, however, very seldom, and then they turned out to be male organs in most cases. There were but two instances of copulation dreamt. Girls and young women were the, usual _dramatis personæ_, and, curiously enough, often the aggressors. Sometimes the face or faces were well known; sometimes, only once seen; sometimes, entirely unknown. The orgasm occurs at the most erotic part of the dream, the physical and psychical running parallel. This most erotic or suggestive part of the dream was very often quite an innocent looking incident enough. As, for example: while passing a strange young woman, overtaken on the street, she calls after me some question. At first, I pay no heed, but when she calls again, I hesitate whether to turn back and answer or not--emission. Again, walking beside a young woman, she said, 'Shall I take your arm?' I offered it, and she took it, entwining her arm around it, and raising it high--emission. I could feel stronger erection as she asked the question. Sometimes, a word was enough; sometimes, a gesture. Once emission took place on my noticing the young woman's diminished finger-nails. Another example of fetichism was my being curiously attracted in a dream by the pretty embroidered figure on a little girl's dress. As an illustration of the strange metamorphoses that occur in dreams, I one night, in my dream (I had been observing partridges in the summer) fell in love with a partridge, which changed under my caresses to a beautiful girl, who yet retained an indescribable wild-bird innocence, grace, and charm--a sort of Undina!"
These experiences may be regarded as fairly typical of the erotic dreams of healthy and chaste young men. The bird, for instance, that changes into a woman while retaining some elements of the bird, has been encountered in erotic dreams by other young men. It is indeed remarkable that, as De Gubernatis observes, "the bird is a well-known phallic symbol," while Maeder finds ("Interprétations de Quelques Rêves," _Archives de Psychologie_, April, 1907) that birds have a sexual significance both in life and in dreams. The appearance of male organs in the dream-woman is doubtless due to the dreamer's greater familiarity with those organs; but, though it occurs occasionally, it can scarcely be said to be the rule in erotic dreams. Even men who have never had connection with a woman, are quite commonly aware of the presence of a woman's sexual organs in their erotic dreams.
Moll's comparison of nocturnal emissions of semen with nocturnal incontinence of urine suggests an interesting resemblance, and at the same time seeming contrast. In both cases we are concerned with viscera which, when overfilled or unduly irritable, spasmodically eject their contents during sleep. There is a further resemblance which usually becomes clear when, as occasionally happens, nocturnal incontinence of urine persists on to late childhood or adolescence: both phenomena are frequently accompanied by vivid dreams of appropriate character. (See e.g. Ries, "Ueber Enuresis Nocturna," _Monatsschrift für Harnkrankheiten und Sexuelle Hygiene_, 1904; A.P. Buchan, nearly a century ago, pointed out the psychic element in the experiences of young persons who wetted the bed, _Venus sine Concubitu_, 1816, p. 47.) Thus, in one case known to me, a child of seven, who occasionally wetted the bed, usually dreamed at the same time that she wanted to make water, and was out of doors, running to find a suitable spot, which she at last found, and, on awaking, discovered that she had wetted the bed; fifteen years later she still sometimes had similar dreams, which caused her much alarm until, when thoroughly awake, she realized that no accident had happened; these later dreams were not the result of any actual strong desire to urinate. In another case with which I am acquainted, a little girl of eight, after mental excitement or indigestible meals, occasionally wetted the bed, dreaming that she was frightened by some one running after her, and wetted herself in consequence, after the manner of the Ganymede in the eagle's clutch, as depicted by Rembrandt. These two cases, it may be noted, belong to two quite different types. In the first case, the full bladder suggests to imagination the appropriate actions for relief, and the bladder actually accepts the imaginative solution offered; it is, according to Fiorani's phrase, "somnambulism of the bladder." In the other case, there is no such somnambulism, but a psychic and nervous disturbance, not arising in the bladder at all, irradiates convulsively, and whether or not the bladder is overfull, attacks a vesical nervous system which is not yet sufficiently well-balanced to withstand the inflow of excitement. In children of somewhat nervous temperament, manifestations of this kind may occur as an occasional accident, up to about the age of seven or eight; and thereafter, the nervous control of the bladder having become firmly established, they cease to happen, the nervous energy required to affect the bladder sufficing to awake the dreamer. In very rare cases, however, the phenomenon may still occasionally happen, even in adolescence or later, in individuals who are otherwise quite free from it. This is most apt to occur in young women even in waking life. In men it is probably extremely rare.
The erotic dream seems to differ flagrantly from the vesical dream, in that it occurs in adult life, and is with difficulty brought under control. The contrast is, however, very superficial. When we remember that sexual activity only begins normally at puberty, we realize that the youth of twenty is, in the matter of sexual control, scarcely much older than in the matter of vesical control he was at the age of six. Moreover, if we were habitually, from our earliest years, to go to bed with a full bladder, as the chaste man goes to bed with unrelieved sexual system, it would be fully as difficult to gain vesical control during sleep as it now is to gain sexual control. Ultimately, such sexual control is attained; after the age of forty, it seems that erotic dreams with emission become more and more rare; either the dream occurs without actual emission, exactly as dreams of urination occur in adults with full bladder, or else the organic stress, with or without dreams, serves to awaken the sleeper before any emission has occurred. But this stage is not easily or completely attained. St. Augustine, even at the period when he wrote his _Confessions_, mentions, as a matter of course, that sexual dreams "not merely arouse pleasure, but gain the consent of the will." (X. 41.) Not infrequently there is a struggle in sleep, just as the hypnotic subject may resist suggestions; thus, a lady of thirty-five dreamed a sexual dream, and awoke without excitement; again she fell asleep, and had another dream of sexual character, but resisted the tendency to excitement, and again awoke; finally, she fell asleep and had a third sexual dream, which was this time accompanied by the orgasm. (This has recently been described also by Näcke, who terms it _pollutio interrupta, Neurologisches Centralblatt_, Oct. 16, 1909; the corresponding voluntary process in the waking state is described by Rohleder and termed _masturbatio interrupta, Zeitschrift für Sexualwissenschaft_, Aug., 1908.) The factors involved in the acquirement of vesical and sexual control during sleep are the same, but the conditions are somewhat different.
There is a very intimate connection between the vesical and the sexual spheres, as I have elsewhere pointed out (see e.g. in the third volume of these _Studies_, "Analysis of the Sexual Impulse"). This connection is psychic as well as organic. Both in men and women, a full bladder tends to develop erotic dreams. (See e.g. K.A. Scherner, _Das Leben des Traums_, 1861, pp. 187 et seq.; Spitta also points out the connection between vesical and erotic dreams, _Die Schlaf und Traumzustände_, 2d ed., 1882, pp. 250 et seq.) Raymond and Janet state (_Les Obscessions_, vol. ii, p. 135) that nocturnal incontinence of urine, accompanied by dreams of urination, may be replaced at puberty by masturbation. In the reverse direction, Freud believes (_Monatsschrift für Psychiatrie_, Bd. XVIII, p. 433) that masturbation plays a large part in causing the bed-wetting of children who have passed the age when that usually ceases, and he even finds that children are themselves aware of the connection.
The diagnostic value of sexual dreams, as an indication of the sexual nature of the subject when awake, has been emphasized by various writers. (E.g., Moll, _Die Konträre Sexualempfindung_, Ch. IX; Näcke, "Der Traum als feinstes Reagens für die Art des sexuellen Empfindens," _Monatsschrift für Kriminalpsychologie_, 1905, p. 500.) Sexual dreams tend to reproduce, and even to accentuate, those characteristics which make the strongest sexual appeal to the subject when awake.
At the same time, this general statement has to be qualified, more especially as regards inverted dreams. In the first place, a young man, however normal, who is not familiar with the feminine body when awake, is not likely to see it when asleep, even in dreams of women; in the second place, the confusions and combinations of dream imagery often tend to obliterate sexual distinctions, however free from perversions the subjects may be. Thus, a correspondent tells me of a healthy man, of very pure character, totally inexperienced in sexual matters, and never having seen a woman naked, who, in his sexual dreams, always sees the woman with male organs, though he has never had any sexual inclinations for men, and is much in love with a lady. The confusions and associations of dream imagery, leading to abnormal combinations, may be illustrated by a dream which once occurred to me after reading Joest's account of how a young negress, whose tattoo-marks he was sketching, having become bored, suddenly pressed her hands to her breasts, spirting two streams of lukewarm milk into his face, and ran away laughing; I dreamed of a woman performing a similar action, not from her breasts, however, but from a penis with which she was furnished. Again, by another kind of confusion, a man dreams sexually that he is with a man, although the figure of the partner revealed in the dream is a woman. The following dream, in a normal man who had never been, or wished to be, in the position shown by the dream, may be quoted: "I dreamed that I was a big boy, and that a younger boy lay close beside me, and that we (or, certainly, he) had seminal emissions; I was complacently passive, and had a feeling of shame when the boy was discovered. On awaking I found I had had no emission, but was lying very close to my wife. The day before, I had seen boys in a swimming-match." This was, it seems to me, an example of dream confusion, and not an erotic inverted dream. (Näcke also brings forward inverted dreams by normal persons; see e.g. his "Beiträge zu den sexuellen Träumen," _Archiv für Kriminal-Anthropologie_, Bd. XX, 1908, p. 366.)
So far as I have been able to ascertain, there seem to be, generally speaking, certain differences in the manifestations of auto-erotism during sleep in men and women which I believe to be not without psychological significance. In men the phenomenon is fairly simple; it usually appears about puberty continues at intervals of varying duration during sexual life provided the individual is living chastely, and is generally, though not always, accompanied by erotic dreams which lead up to the climax, its occurrence being, to some extent, influenced by a variety of circumstances: physical, mental, or emotional excitement, alcohol taken before retiring, position in bed (as lying on the back), the state of the bladder, sometimes the mere fact of being in a strange bed, and to some extent apparently by the existence of monthly and yearly rhythms. On the whole, it is a fairly definite and regular phenomenon which usually leaves little conscious trace on awaking, beyond probably some sense of fatigue and, occasionally, a headache. In women, however, the phenomena of auto-erotism during sleep seem to be much more irregular, varied, and diffused. So far as I have been able to make inquiries, it is the exception rather than the rule for girls to experience definitely erotic dreams about the period of puberty or adolescence.[238] Auto-erotic phenomena during sleep in women who have never experienced the orgasm when awake are usually of a very vague kind; while it is the rule in a chaste youth for the orgasm thus to manifest itself, it is the exception in a chaste girl. It is not, as a rule, until the orgasm has been definitely produced in the waking state--under whatever conditions it may have been produced--that it begins to occur during sleep, and even in a strongly sexual woman living a repressed life it is often comparatively infrequent.[239] Thus, a young medical woman who endeavors to deal strenuously with her physical sexual emotions writes: "I sleep soundly, and do not dream at all. Occasionally, but very rarely, I have had sensations which awakened me suddenly. They can scarcely be called dreams, for they are mere impulses, nothing connected or coherent, yet prompted, I know, by sexual feeling. This is probably an experience common to all." Another lady (with a restrained psycho-sexual tendency to be attracted to both sexes), states that her first sexual sensations with orgasm were felt in dreams at the age of 16, but these dreams, which she has now forgotten, were not agreeable and not erotic; two or three years later spontaneous orgasm began to occur occasionally when awake, and after this, orgasm took place regularly once or twice a week in sleep, but still without erotic dreams; she merely dreamt that the orgasm was occurring and awoke as it took place.
It is possible that to the comparative rarity in chaste women of complete orgasm during sleep, we may in part attribute the violence with which repressed sexual emotion in women often manifests itself.[240] There is thus a difference here between men and women which is of some significance when we are considering the natural satisfaction of the sexual impulse in chaste women.
In women, who have become accustomed to sexual intercourse, erotic dreams of fully developed character occur, with complete orgasm and accompanying relief--as may occasionally be the case in women who are not acquainted with actual intercourse;[241] some women, however, even when familiar with actual coitus, find that sexual dreams, though accompanied by emissions, are only the symptoms of desire and do not produce actual relief.
Some interest attaches to cases in which young women, even girls at puberty, experience dreams of erotic character, or at all events dream concerning coitus or men in erection, although they profess, and almost certainly with truth, to be quite ignorant of sexual phenomena. Several such dreams of remarkable character have been communicated to me. One can imagine that the psychologists of some schools would see in these dreams the spontaneous eruption of the experiences of the race. I am inclined to regard them as forgotten memories, such as we know to occur sometimes in sleep. The child has somehow seen or heard of sexual phenomena and felt no interest, and the memory may subsequently be aroused in sleep, under the stimulation of new-born sexual sensations.
It is a curious proof of the ignorance which has prevailed in recent times concerning the psychic sexual nature of women that, although in earlier ages the fact that women are normally liable to erotic dreams was fully recognized, in recent times it has been denied, even by writers who have made a special study of the sexual impulse in women. Eulenburg (_Sexuale Neuropathie_, 1895, pp. 31, 79) appears to regard the appearances of sexual phenomena during sleep, in women, as the result of masturbation. Adler, in what is in many respects an extremely careful study of sexual phenomena in women (_Die Mangelhafte Geschlechtsempfindung des Weibes_, 1904, p. 130), boldly states that they do not have erotic dreams. In 1847, E. Guibout ("Des Pollutions Involontaires chez la Femme," _Union Médicale_, p. 260) presented the case of a married lady who masturbated from the age of ten, and continued the practice, even after her marriage at twenty-four, and at twenty-nine began to have erotic dreams with emissions every few nights, and later sometimes even several times a night, though they ceased to be voluptuous; he believed the case to be the first ever reported of such a condition in a woman. Yet, thousands of years ago, the Indian of Vedic days recognized erotic dreams in women as an ordinary and normal occurrence. (Löwenfeld quotes a passage to this effect from the Oupnek'hat,