The fundamental function of woman being motherhood, this with its secondary manifestations explains much of her behavior. The devotion of the young girl to the cadet who enslaves her reveals the same instinct which holds a wife faithful through difficulties and degradation,—the instinct from which have developed the virtues of loyalty, endurance and self-sacrifice. The period of pregnancy should be (if the imagination be not filled with old wives’ tales) one of health, exhilaration, development of psychic values and social consciousness. Any woman experiencing this wonderful functioning should be aided to as complete psycho-biological fulfillment as her personality and the social situation permit. Should the higher love and association of the father of her child be lacking, so much the greater is her need of genuine help and encouragement. Given this, she may be strengthened and stabilized whether the man desert or become disaffected before or after a legal ceremony. Though mating and its resulting responsibilities have evolved our highest virtues, marriage is now under attack. Not only are divorce and illegitimacy evidenced as showing its failure, but intellectual women are demanding freedom and self-expression which they find doubtful in marriage. In Paris one woman who believed the relation of the unmarried mother to her child more ethical under French law than that of the married mother, lived out of wedlock for years of monogamous mating, her daughter bearing her name. She and the father of her child were leaders in La Ligue pour le Droit des Femmes, of which Victor Hugo was an early president. Fundamentally this attack is encouraging, indicating effort to bring law up to newer ideals of ethical mating. Man’s marriage law was based upon economics, upon the idea of possession and inheritance of possessions. In Scandinavia, where woman has for some time been voting, there is a tendency to make the law conform to biology. In Norway all births are registered. The father as well as the mother must be held responsible and there are no illegitimate children. Under their law for children born out of wedlock which went into effect in 1915, in only nine out of the first five thousand cases was paternity contested. Here law is conforming to biologic fact. Before science can offer a new marriage law the psychology of mating must be further studied. Women are classifying as prostitution a marriage in which psychical values are ignored. They seek chastity in marriage according to the definition given in Doctor S. Herbert’s Fundamentals in Sexual Ethics, “Chastity—true chastity—has reference not so much to actions as to feelings and motives. It is the quality of the emotion in relation to sexual acts that constitutes a state of purity or impurity.”