It is this affectional function which is manifested by betrothed lovers in their beautiful period of mutual understanding, sympathy, and affection. It is that characteristic of the courting days which is so precious to the woman, but which is too often sadly missed by the wife after the honeymoon. It exists often before the fires of passion are kindled, and it persists often after the flame of passion has died away. It is the expression of the purest love of youth, and of the tenderest affection of age. It is this form of sexual relation, physical though it may be, that is the outgrowth of evolution in man. May it not be that in this way man has "improved upon the sexual habits of the animals"; and that when man violates the natural restrictions held sacred by animal life, and indulges in excessive sexual relations in and out of season, that he is really manifesting a degenerative tendency instead of taking an upward step on the evolutionary scale. There have been many excellent authorities who have held that this affectional function, and its manifestation, is far better calculated to satisfy the sexual instincts of advanced men and women than is the ordinary physical sexual relation. They claim that in the higher form of this affectional relation is to be found the secret of the joy, bliss, and happiness of the betrothed lovers, which alas! too often disappear when the other form of the relation is manifested, particularly when manifested to excess in the manner customary to so many married men. They claim that in the recognition of this fact of human life and love is to be found the secret of married happiness between wedded advanced and cultured individuals. They assert that the experience of the race, rightly considered and understood, full proves this contention.