If sex-education succeeds in giving young people this enlightened attitude, there will be little difficulty in solving most of the ethical and hygienic problems of sex. A young man who has caught a glimpse of the highest interpretation of sex in its relation to human life, in short a young man to whom all natural sexual processes are essentially pure and noble and beautiful, is not one who will make grave hygienic mistakes in his own life, and he will not be personally connected with the social evil and its diseases, and he will avoid almost intuitively the physiologic and psychologic mistakes that most often cause matrimonial disaster. Everything, then, in successful sex-education depends upon the attitude formed in the minds of learners; and towards this our major efforts should be directed. [Sidenote: Comparison with animals not helpful.] The prevailing vulgar attitude towards sex will not be greatly improved by repeated emphasis upon the animal nature of reproduction in attempts at supporting the thesis that propagation is the sole function of sexual processes in human life. Such an interpretation of human sexuality as purely animalistic in function is implied, if not expressed, by some workers for the "purity" movement. I sincerely believe that such a view will inevitably tend to increase the feeling that sexual processes are heritages from the beasts which unfortunately must be tolerated because nature has provided no other way for perpetuating human life. [Sidenote: Sexual pessimism.] An intelligent woman, a happy wife and mother, who had accepted this ascetic and pessimistic view of sex, said the other day: "Oh, love and marriage and motherhood would be so beautiful were it possible to escape the unspeakably vulgar facts of physical life!" Poor woman! It must have been some fiend incarnate who in the guise of a prophet of purity preached to her the animalistic interpretation of sex, which made her overlook the fact that the very beauty which she could not quite grasp had its origin in her emotions arising from the despised sexual nature. This is not an isolated case. Several young women who have graduated from college within ten years vouch for the statement that many thoughtful students are strong in the belief that ideal marriage is platonic friendship and that it is a sad fact of life that husband and wife must lay aside their high ideals in order to become parents.