(_a_) The definite purpose of certain criminal offences committed against women under age is simply to supply fresh and new wares for the market of prostitution. For it is not only or mainly women who, in respect of physical beauty, age, or of some other circumstance, are of comparatively little value, that become prostitutes. Among the men who have recourse to prostitutes are some who can pay high fees, and therefore demand an article of high quality. Among these latter, there are, of course, some who actually prefer experienced prostitutes. But most of them demand especially physical beauty, and this is more likely to be possessed by younger women than by older ones. A considerable proportion of prostitutes are under legal age; a large majority of them have entered the career of professional prostitution before coming of age. An adult woman is much less likely than one under age to become a prostitute. Statistical data bearing on this question are, however, lacking. The white-slave traffic has to-day attained gigantic proportions; the sources of this traffic are supplied by professional procurement, a branch of industry in which many thousands are engaged. It is obvious that the young girls who will attract the attention of the professional procurer or procuress will, for the most part, belong to the proletariat. (_b_) Prostitution is an unceasing source of the venereal diseases, the character of these in any district being intimately associated with the characteristics of prostitution in that district. The principal seats of prostitution are the true foci of the venereal diseases. (_c_) The matter of women’s wages has already been discussed.[7] (_d_) Prostitution leads to the corruption of children’s morals and drags them into vicious courses. Prostitutes usually live in those quarters of the town, in those streets, in those houses, in which the population belongs mainly to the proletariat. It is utterly improper that prostitutes should live in the same house with persons who have young children. Indeed, the question arises whether prostitutes should not be absolutely forbidden to live in any house in which there are persons under age.