It requires little imagination to see that after months or years of such embittered sleeplessness, the woman tends not only to become neurasthenic but also resentful towards her husband. She is probably too ignorant and unobservant of her own physiology to realise the full meaning of what is taking place, but she feels vaguely that he is to blame, and that she is being sacrificed for what, in her still greater ignorance of _his_ physiology, seems to her to be his mere pleasure and self-indulgence. He, with his health maintained by the natural outlet followed by recuperative sleep, is not likely to be ready to look into the gloomy and shadowy land of vague reproach and inexplicable trivial wrongs which are all the expression she gives to her unformulated physical grievance. So he is likely to set down any resentment she may show to "nerves" or "captiousness"; and to be first solicitous, and then impatient, towards her apparently irrelevant complaints. If he is, as many men are, tender and considerate, he may try to remedy matters by restricting to the extreme limit of what is absolutely necessary for him, the number of times they come together. Unconsciously he thus only makes matters worse; for as a general rule, he is quite unaware of his wife's rhythm, and does not arrange to coincide with it in his infrequent tender embraces. As he is now probably sleeping in another room and not daring to come for the nightly talks and tenderness which are so sweet a privilege of marriage, here, as in other ways, his well-meaning but wrongly-conceived efforts at restraint only tend to drive the pair still further apart. To make plain the reasonableness of my view regarding sleep, it is necessary to mention some of the immensely profound influences which it is now known that sex exerts, even when not stimulated to its specific use. In those who are deprived of their sex-organs, particularly when young, many of the other features and organs of the body develop abnormally or fail to appear. Castrated boys (eunuchs) when grown up, tend to have little or no beard, or moustache, to have high-pitched voices and several other characters which separate them from normal men.