Coitus reservatus,—in which intercourse is maintained even for very long periods, during which the woman may have orgasm several times while the man succeeds in holding back orgasm,—so far from being injurious to the woman, is probably the form of coitus which gives her the maximum of gratification and relief. For most men, however, it seems probable that this self-control over the processes leading to the involuntary act of detumescence is difficult to acquire, while in weak, nervous, and erethic persons it is impossible. It is, however, a desirable condition for completely adequate coitus, and in the East this is fully recognized, and the aptitude carefully cultivated. Thus W. D. Sutherland states ("Einiges über das Alltagsleben und die Volksmedizin unter den Bauern Britischostindiens," Münchener Medizinische Wochenschrift, No. 12, 1906) that the Hindu smokes and talks during intercourse in order to delay orgasm, and sometimes applies an opium paste to the glans of the penis for the same purpose. (See also vol. iii of these Studies, "The Sexual Impulse in Women.") Some authorities have, indeed, stated that the prolongation of the act of coitus is injurious in its effect on the male. Thus R. W. Taylor (Practical Treatise on Sexual Disorders, third ed., p. 121) states that it tends to cause atonic impotence, and Löwenfeld (Sexualleben und Nervenleiden, p. 74) thinks that the swift and unimpeded culmination of the sexual act is necessary in order to preserve the vigor of the reflex reactions. This is probably true of extreme and often repeated cases of indefinite prolongation of pronounced erection without detumescence, but it is not true within fairly wide limits in the case of healthy persons. Prolonged coitus reservatus was a practice of the complex marriage system of the Oneida community, and I was assured by the late Noyes Miller, who had spent the greater part of his life in the community, that the practice had no sort of evil result. Coitus reservatus was erected into a principle in the Oneida community. Every man in the community was theoretically the husband of every woman, but every man was not free to have children with every woman. Sexual initiation took place soon after puberty in the case of boys, some years later in the case of girls, by a much older person of the opposite sex. In intercourse the male inserted his penis into the vagina and retained it there for even an hour without emission, though orgasm took place in the woman. There was usually no emission in the case of the man, even after withdrawal, and he felt no need of emission. The social feeling of the community was a force on the side of this practice, the careless, unskilful men being avoided by women, while the general romantic sentiment of affection for all the women in the community was also a force. Masturbation was unknown, and no irregular relations took place with persons outside the community. The practice was maintained for thirty years, and was finally abandoned, not on its demerits, but in deference to the opinions of the outside world. Mr. Miller admitted that the practice became more difficult in ordinary marriage, which favors a more mechanical habit of intercourse. The information received from Mr. Miller is supplemented in a pamphlet entitled Male Continence (the name given to coitus reservatus in the community), written in 1872 by the founder, John Humphrey Noyes. The practice is based, he says, on the fact that sexual intercourse consists of two acts, a social and a propagative, and that if propagation is to be scientific there must be no confusion of these two acts, and procreation must never be involuntary. It was in 1844, he states, that this idea occurred to him as a result of a resolve to abstain from sexual intercourse in consequence of his wife's delicate health and inability to bear healthy children, and in his own case he found the practice "a great deliverance. It made a happy household." He points out that the chief members of the Oneida community "belonged to the most respectable families in Vermont, had been educated in the best schools of New England morality and refinement, and were, by the ordinary standards, irreproachable in their conduct so far as sexual matters are concerned, till they deliberately commenced, in 1846, the experiment of a new state of society, on principles which they had been long maturing and were prepared to defend before the World." In relation to male continence, therefore, Noyes thought the community might fairly be considered "the Committee of Providence to test its value in actual life." He states that a careful medical comparison of the statistics of the community had shown that the rate of nervous disease in the community was considerably below the average outside, and that only two cases of nervous disorder had occurred which could be traced with any probability to a misuse of male continence. This has been confirmed by Van de Warker, who studied forty-two women of the community without finding any undue prevalence of reproductive diseases, nor could he find any diseased condition attributable to the sexual habits of the community (cf. C. Reed, Text-Book of Gynecology, 1901, p. 9).

Noyes believed that "male continence" had never previously been a definitely recognized practice based on theory, though there might have been occasional approximation to it. This is probably true if the coitus is reservatus in the full sense, with complete absence of emission. Prolonged coitus, however, permitting the woman to have orgasm more than once, while the man has none, has long been recognized. Thus in the seventeenth century Zacchia discussed whether such a practice is legitimate (Zacchiæ Quæstionum Opus, ed. of 1688, lib. vii, tit. iii, quæst. VI). In modern times it is occasionally practiced, without any theory, and is always appreciated by the woman, while it appears to have no bad effect on the man. In such a case it will happen that the act of coitus may last for an hour and a quarter or even longer, the maximum of the woman's pleasure not being reached until three-quarters of an hour have passed; during this period the woman will experience orgasm some four or five times, the man only at the end. It may occasionally happen that a little later the woman again experiences desire, and intercourse begins afresh in the same way. But after that she is satisfied, and there is no recurrence of desire.

It may be desirable at this point to refer briefly to the chief variations in the method of effecting coitus in their relationship to the art of love and the attainment of adequate and satisfying detumescence.

The primary and essential characteristic of the specifically human method of coitus is the fact that it takes place face to face. The fact that in what is usually considered the typically normal method of coitus the woman lies supine and the man above her is secondary. Psychically, this front-to-front attitude represents a great advance over the quadrupedal method. The two partners reveal to each other the most important, the most beautiful, the most expressive sides of themselves, and thus multiply the mutual pleasure and harmony of the intimate act of union. Moreover, this face-to-face attitude possesses a great significance, in the fact that it is the outward sign that the human couple has outgrown the animal sexual attitude of the hunter seizing his prey in the act of flight, and content to enjoy it in that attitude, from behind. The human male may be said to retain the same attitude, but the female has turned round; she has faced her partner and approached him, and so symbolizes her deliberate consent to the act of union.

The human variations in the exercise of coitus, both individual and national, are, however, extremely numerous. "To be quite frank," says Fürbringer (Senator and Kaminer, Health and Disease in Relation to Marriage, vol. i, p. 213), "I can hardly think of any combination which does not figure among my case-notes as having been practiced by my patients." We must not too hastily conclude that such variations are due to vicious training. That is far from being the case. They often occur naturally and spontaneously. Freud has properly pointed out (in the second series of his Beiträge zur Neurosenlehre, "Bruchstück" etc.) that we must not be too shocked even when the idea of fellatio spontaneously presents itself to a woman, for that idea has a harmless origin in the resemblance between the penis and the nipple. Similarly, it may be added, the desire for cunnilinctus, which seems to be much more often latently present in women than is the desire for its performance in men, has a natural analogy in the pleasure of suckling, a pleasure which is itself indeed often erotically tinged (see vol. iv of these Studies, "Sexual Selection in Man," Touch, Sect. III).

Every variation in this matter, remarks Remy de Gourmont (Physique de l'Amour, p. 264) partakes of the sin of luxury, and some of the theologians have indeed considered any position in coitus but that which is usually called normal in Europe as a mortal sin. Other theologians, however, regarded such variations as only venial sins, provided ejaculation took place in the vagina, just as some theologians would permit irrumatio as a preliminary to coitus, provided there was no ejaculation. Aquinas took a serious view of the deviations from normal intercourse; Sanchez was more indulgent, especially in view of his doctrine, derived from the Greek and Arabic natural philosophers, that the womb can attract the sperm, so that the natural end may be attained even in unusual positions.

Whatever difference of opinion there may have been among ancient theologians, it is well recognized by modern physicians that variations from the ordinary method of coitus are desirable in special cases. Thus Kisch points out (Sterilität des Weibes, p. 107) that in some cases it is only possible for the woman to experience sexual excitement when coitus takes place in the lateral position, or in the a posteriori position, or when the usual position is reversed; and in his Sexual Life of Woman, also, Kisch recommends several variations of position for coitus. Adler points out (op. cit., pp. 151, 186) the value of the same positions in some cases, and remarks that such variations often call forth latent sexual feelings as by a charm. Such cases are indeed, by no means infrequent, the advantage of the unusual position being due either to physical or psychic causes, and the discovery of the right variation is sometimes found in a merely playful attempt. It has occasionally happened, also, that when intercourse has habitually taken place in an abnormal position, no satisfaction is experienced by the woman until the normal position is adopted. The only fairly common variation of coitus which meets with unqualified disapproval is that in the erect posture. (See e.g., Hammond, op. cit. pp. 257 et seq.)

Lucretius specially recommended the quadrupedal variation of coitus (Bk. iv, 1258), and Ovid describes (end of Bk. iii of the Ars Amatoria) what he regards as agreeable variations, giving the preference, as the easiest and simplest method, to that in which the woman lies half supine on her side. Perhaps, however, the variation which is nearest to the normal attitude and which has most often and most completely commended itself is that apparently known to Arabic erotic writers as dok el arz, in which the man is seated and his partner is astride his thighs, embracing his body with her legs and his neck with her arms, while he embraces her waist; this is stated in the Arabic Perfumed Garden to be the method preferred by most women.

The other most usual variation is the inverse normal position in which the man is supine, and the woman adapts herself to this position, which permits of several modifications obviously advantageous, especially when the man is much larger than his partner. The Christian as well as the Mahommedan theologians appear, indeed, to have been generally opposed to this superior position of the female, apparently, it would seem, because they regarded the literal subjection of the male which it involves as symbolic of a moral subjection. The testimony of many people to-day, however, is decidedly in favor of this position, more especially as regards the woman, since it enables her to obtain a better adjustment and greater control of the process, and so frequently to secure sexual satisfaction which she may find difficult or impossible in the normal position.

The theologians seem to have been less unfavorably disposed to the position normal among quadrupeds, a posteriori, though the old Penitentials were inclined to treat it severely, the Penitential of Angers prescribing forty days penance, and Egbert's three years, if practiced habitually. (It is discussed by J. Petermann, "Venus Aversa," Sexual-Probleme, Feb., 1909). There are good reasons why in many cases this position should be desirable, more especially from the point of view of women, who indeed not infrequently prefer it. It must be always remembered, as has already been pointed out, that in the progress from anthropoid to man it is the female, not the male, whose method of coitus has been revolutionized. While, however, the obverse human position represents a psychic advance, there has never been a complete physical readjustment of the female organs to the obverse method. More especially, in Adler's opinion (op. cit., pp. 117-119), the position of the clitoris is such that, as a rule, it is more easily excited by coitus from behind than from in front. A more recent writer, Klotz, in his book, Der Mensch ein Vierfüssler (1908), even takes the too extreme position that the quadrupedal method of coitus, being the only method that insures due contact with the clitoris, is the natural human method. It must, however, be admitted that the posterior mode of coitus is not only a widespread, but a very important variation, in either of its two most important forms: the Pompeiian method, in which the woman bends forwards and the man approaches behind, or the method described by Boccaccio, in which the man is supine and the woman astride.