The exquisite, unselfish tenderness which is aroused in a man by the sense of mental and spiritual harmony with a wife who sympathises with, because she understands, his needs is one of the loveliest things in marriage. The wife who knows how to waken this tenderness in a man raises him out of the self-centred slough in which so many men wallow unhappily. With an ardent man, wholly devoted to his wife and long deprived of her, the time will come when it will be sufficient for him to be near her and caress her for relief to take place without any physical connection. After the birth of the first child the health of the mother and of the baby both demand that there should be no hurried beginning of a second. _At least_ a year should pass before the second little life is allowed to begin its unfolding, so that _a minimum_ of about two years should elapse before the second child is born. The importance of this, both for the mother and for the child, is generally adequately recognised by medical specialists, and some distinguished gynecologists advocate as much as three or five years between the births of successive children. While in the whole human relation there is no slavery or torture so horrible as coerced, unwilling motherhood, there is no joy and pride greater than that of a woman who is bearing the developing child of a man she adores. It is a serious reflection on our poisoned "civilisation" that a pregnant woman should feel shame to appear in the streets. Never will the race reach true health till it is cured of its prurient sickness, and the prospective mother can carry her sacred burden as a priestess in a triumphal procession. (See Addition 3, p. 117.) Of the innumerable problems which touch upon the qualities transmitted to the children by their parents, the study of which may be covered by the general term Eugenics, I shall here say nothing: nor shall I deal with the problems of birth and child-rearing. Many writers have considered these subjects, and my purpose in this book is to present aspects of sex-life which have been more or less neglected by others. While throughout I have omitted the consideration of abnormalities, there is one condition which verges on the abnormal but yet touches the lives of some married people who are individually both normal and healthy, about which a few words need to be said. It not infrequently happens that two healthy, loving people, for no apparent reason, seem unable to have a child. (See Addition 4, p. 119.) The old-fashioned view was that the fault lay with the woman, and the reproach of being a barren woman is one which brought untold anguish to many hearts. It is now beginning to be recognised, however, that in a childless union the "fault," if fault it be, is as often the man's as the woman's, particularly where the husband is a brain worker in a city.