It is true that in coitus woman has but a slight external secretion, and that principally of mucus. But we have no external signs of all the complex processes and reactions going on in digestion and during the production of digestive secretions. When, as is the case in orgasm, we have such intense and apparent nervous, vascular and muscular reactions, it seems inevitable that there must be correspondingly profound internal correlations. Is it conceivable that organs so fundamentally placed, and whose mere existence we know affects the personal characters of women, could escape physiological result from the intense preliminary stimulus and acute sensations of an orgasm? To ask this question is surely to answer it. It is to my mind inconceivable that the orgasm in woman as in man should not have profound physiological effects. Did we know enough about the subject, many of the "nervous breakdowns" and neurotic tendencies of the modern woman could be directly traced to the partial stimulation of sexual intercourse without its normal completion which is so prevalent in modern marriage. This subject, and its numerous ramifications, are well worth the careful research of the most highly-trained physiologists. There is nothing more profound, or of more vital moment to modern humanity as a whole, than is the understanding of the sex nature and sex needs of men and women. I may point out as a mere suggestion that the man's sex-organs give rise to _external_ and also to _internal_ secretions. The former only leave the glands which secrete them as a result of definite stimulus; the latter appear to be perpetually exuded in small quantities and always to be entering and influencing the whole system. In women we know there are corresponding perpetual internal secretions, and it seems evident to me that there must be some internal secretions which are only released under the definite stimulus of the whole sex-act. The English and American peoples, who lead the world in so many ways, have an almost unprecedentedly high proportion of married women who get no satisfaction from physical union with their husbands, though they bear children, and may in every other respect appear to be happily married. The modern civilised neurotic woman has become a by-word in the Western world. Why? I am certain that much of this suffering is caused by the _ignorance_ of both men and women regarding not only the inner physiology, but even the obvious outward expression, of the complete sex-act.