A natural division of the subject here presents itself. The problems of venereal infection are different before and after marriage. A practical knowledge of the physical facts of sex should be the possession of every girl some years before the age of marriage. Sex must cease to be a subject on which it is not decent for a girl to speak. Until this has been achieved, it will be impossible to have that frankness between lovers which will make certain an acknowledgment being made of infection, if it is or ever has been present in the man, so as to do away with the dangers of concealment and further disease. In my opinion, this openness is of necessary importance to the wise choice on the part of girls of the men they are to marry. Our whole attitude towards youth in relation to sex is mistaken. And some of our worst mistakes take a direction not usually recognised. We often over-emphasise the possibilities of romantic love and chivalrous devotion, or we leave our children to gain this false attitude from the books they read. This is bad for both boys and girls. To personify all inspiration and nobility as Woman often but acts to make unknown vice attractive to youth. The unknown is almost always desirable. It is probable that times and places where excessive respect for women has been expressed in poetry and romance have been distinguished by looseness of sexual habits; just in the same way and for the same reason that extremely vulgar behaviour between the sexes is compatible with the strictest physical chastity. In the case of girls, the evil that may be done by over-exalting romantic love is a different one. To idealise the male virtues of courage, adventurousness and self-confidence comes near, in many cases, to teaching the girls admiration for the calm, reckless Don Juan. This is the man who is likely to have been infected by venereal diseases.