One result of this characteristic is that, more especially when love is unduly delayed beyond the first youth, this complex apparatus has difficulty in responding to the unfamiliar demands of sexual excitement. Moreover, delayed normal sexual relations, when the sexual impulse is not absolutely latent, tend to induce all degrees of perverted or abnormal sexual gratification, and the physical mechanism when trained to respond in other ways often fails to respond normally when, at last, the normal conditions of response are presented. In all these ways passivity and even aversion may be produced in the conjugal relationship. The fact that it is almost normally the function of the male to arouse the female, and that the greater complexity of the sexual mechanism in women leads to more frequent disturbance of that mechanism, produces a simulation of organic sexual coldness which has deceived many. An instructive study of cases in which the sexual impulse has been thus perverted has been presented by Smith Baker ("The Neuropsychical Element in Conjugal Aversion," _Journal of Nervous and Mental Disease_, vol. xvii, September, 1892). Raymond and Janet, who believes that sexual coldness is extremely frequent in marriage, and that it plays an important part in the causation of physical and moral troubles, find that it is most often due to masturbation. (_Les Obsessions_, vol. ii, p. 307.) Adler, after discussing the complexity of the feminine sexual mechanism, and the difficulty which women find in obtaining sexual gratification in normal coitus, concludes that "masturbation is a frequent, perhaps the most frequent, cause of defective sexual sensibility in women." (_Op. cit._, p. 119.) He remarks that in women masturbation usually has less resemblance to normal coitus than in men and involves very frequently the special excitation of parts which are not the chief focus of excitement in coitus, so that coitus fails to supply the excitation which has become habitual (pp. 113-116). In the discussion of "Auto-erotism" in the first volume of these _Studies_, I had already referred to the divorce between the physical and the ideal sides of love which may, especially in women, be induced by masturbation. Another cause of inhibited sexual feeling has been brought forward. A married lady with normal sexual impulse states (_Sexual-Probleme_, April, 1912, p. 290) that she cannot experience orgasm and sexual satisfaction when the intercourse is not for conception. This is a psychic inhibition independent of any disturbance due to the process of prevention. She knows other women who are similarly affected. Such an inhibition must be regarded as artificial and abnormal, since the final result of sexual intercourse, under natural and normal conditions, forms no essential constituent of the psychic process of intercourse.