With regard to prostitution, it seems important that girls should know the essential facts recommended in the lecture concerning boys. The "unprotected" girl of low-grade environment will often need some of this knowledge before she is fourteen (and in some cases, even twelve) years old. On the other hand, the average "protected" girl need not know until several years later. It seems possible that too early familiarity with the existence of sexual vice might tend to make some young women accept it as part of the established order of things; and, hence, the girl whose environment is protective and whose moral training has been complete will be perfectly safe without knowledge of vice and will be more likely to take an opposition attitude if she learns the facts concerning prostitution when she is approaching maturity. Even then the essential information should be given in such a way that the young woman will see the gravity of the social situation and, at the same time, not develop a spirit of sex hostility. Here, again, I must recommend Louise Creighton's "Social Disease and How to Fight It" as not only pointing out the nature of the great evil, but also recognizing that the existing situation can never be improved except by the sympathetic cooperation of the best men and women. [Sidenote: Dancing.] With regard to dancing, young girls should be taught that certain forms of this exercise are not approved by the most refined people. Before maturity, they should not know the physiological reason for this disapproval. In fact, I know many men and women who think it best that most women, even mature, should not have their attention called to the sexual dangers of dancing. For my part, I cannot see how women with such ignorance can cooperate with the best men in reducing the admitted dangers to a minimum. [Sidenote: Dress.] With regard to dress as a sexual problem, some mothers think they can handle the problem with their young daughters by emphasizing modesty and without further explanation; but the drawing power of fashions is so great that most young women are quick to revise their ideas of modesty to suit the latest style. Is it too much to hope that large numbers of young women would accept such facts as were stated in the lecture for young men (Sec. 36), and would be sincere enough to dress so that their attractiveness may appeal more to the aesthetic and less to the physical natures of men? [Sidenote: Merely a man's views.]