(5) The "fair play" or "square deal" appeal to young men should be based on the fact that most for young men who are unchaste demand purity of the girls they claim as sisters, friends, or sweethearts; and yet they help drag down other women. An honorable man should be willing to play fairly and give purity for purity. [Sidenote: Responsibility.] (6) The grave responsibility of young men whose unchastity is connected with illegitimacy or with the organized social evil should be made a strong point in appeals for pre-marital abstinence. [Sidenote: Sexuality and affection.] (7) Young men should be impressed with the idea that their sexual functions should be held sacred to affection; in other words, that sexual union is moral only as love interchange. In so far as young men may be led to this interpretation of the relation of sexuality to the best conceptions of life, there will be no danger of prostitution and there will be a guarantee of marriages that give completeness to affection. The men who are safeguarded against unchastity are those who have learned to think of love and marriage and sexual functioning as interdependent and coincident elements in the great drama of life and who feel the impossibility of their personal interest in marriage without love or in sexual union except as expression of deep affection. Such men are by no means as rare as the sensational reports of the social evil lead many people to believe. [Sidenote: Some men beyond appeal.] I realize that all these seven reasons for continence will fail with that large group of young men who have persuaded themselves that they will never marry and thus they shake off all responsibility such as appeals to the man who looks forward to love that culminates in marriage. No one has yet suggested any line of appeal to the men who are physically or psychically or morally so abnormal that they have no interest in the possibility of marriage; but fortunately such individuals constitute an insignificant minority. Sec. 33. _Essential Knowledge Concerning Prostitution_ [Sidenote: Safeguarding boys.] (1) The adolescent boy should be safeguarded by the knowledge that in every city and in most towns there are women who for financial gain are constantly seeking to entice young men into immoral sexual relations; and that many unwary men are involuntarily entrapped, especially when influenced by alcohol. [Sidenote: Prostitution a business.] (2) The young man should know that the selling of woman's virtue is an organized business known as "prostitution" or "the social evil," words which stand for indescribable degradation and degeneracy that no beast could possibly imitate. Moreover, the young man should be informed that all immorality is not prostitution, but that most of the immoral relations of men are purchased directly or indirectly by money or its equivalent. [Sidenote: Some causes of prostitution.]