Among the chief causes which have impelled women into prostitution rather than into family life are the following: (1) Slavery; (2) poverty; (3) inclination. These causes have been expanded and re-grouped by specialists, but the only addition which the writer sees as necessary in consequence of the study of taboo is the fact that the way of the woman transgressor is peculiarly hard because of the sex taboo, the ignorance and narrowness of good women, and the economic limitations of all women. Ignorance of the results of entrance into a life which usually means abandonment of hope may be a contributing cause. Boredom with the narrowness of family life and desire for adventure are also influences. That sex desire leads directly to the life of the prostitute is unlikely. The strongly sexed class comes into prostitution by the war of irregular relationships with men to whom they have been attached, and who have abandoned them or sold them out. Many authorities agree on the frigidity of the prostitute. It is her protection from physical and emotional exhaustion. This becomes evident when it is learned that these women will receive thirty men a day, sometimes more. A certain original lack of sensitiveness may be assumed, especially since the investigations of prostitutes have shown a large proportion, perhaps one-third, who are mentally inferior. It is an interesting fact that those who are sensitive to their social isolation defend themselves by dwelling on their social necessity. Either intuitively or by a trade tradition, the prostitute feels that "she remains, while creeds and civilizations rise and fall, blasted for the sins of the people." A beautiful young prostitute who had been expelled from a high grade house after the exposures of the Lexow Investigation, once said to the writer: "It would never do for good women to know what beasts men are. We girls have got to pay." The lady, dwelling on her pedestal of isolation, from which she commands the veneration of the chivalrous gentleman and the adoration of the poet, is the product of a leisure assured by property. At the end of the social scale is the girl who wants to be a lady, who doesn't want to work, and who, like the lady, has nothing to sell but herself. The life of the prostitute is the nearest approach for the poor girl to the life of a lady with its leisure, its fine clothes, and its excitement. So long as we have a sex ethics into which are incorporated the taboo concepts, the lady cannot exist without the prostitute. The restrictions which surround the lady guard her from the passions of men. The prostitute has been developed to satisfy masculine needs which it is not permitted the lady to know exist.