It is not easy to find a definition of prostitution which will be accepted by all. I propose to define it as the yielding up for material advantages only of something which should be given for other purposes. A man prostitutes his pen if he takes money for writing lies; it is no prostitution if he accepts money for writing what he believes to be truth. A woman prostitutes her body when she yields it to a man for whom she has no love, in return for money; it is not prostitution if she accepts money from the man she loves. Many other definitions are possible, but if we take this one, we have to admit that there is a vast deal of prostitution within the marriage state, and here, in addition to material advantage, there is often the added sop of social position. Even when not entered into for gain, the marriage is often persisted in for that motive. The effects on men and women and children are bad, but no one has even suggested that reform should be introduced by any methods other than educational ones: to give every girl the means of earning a decent livelihood, so that she is not forced into marriage as into a trade; to encourage reverence for the body and faith in the clean passion of love in both men and women; to create a healthy public opinion in which traffic in the appetites is regarded as repulsive, so that it will be thought as shameful for men to buy as for women to sell gratification; these are the only possible ways of dealing with loveless marriages. What is commonly known as prostitution is, however, carried on outside of marriage, and is promiscuous. It arises from the fact that large numbers of men either have no wife or find one woman insufficient for their gratification. I have said that there are large numbers. Estimates vary enormously as to what proportion of men resort to prostitutes. More facts are badly wanted, but the Chicago Vice Commission of 1911, a commission instituted and carried out by the municipality, states that the number of prostitutes in the city _who do nothing else_ is approximately 5000. It is impossible even to estimate the number of casual and clandestine prostitutes, but they are certainly many. To arrive at some estimate, the commission takes only the 1012 inmates of certain houses, from whose books it appeared that there was a nightly average of _fifteen men per inmate_,[4] and this gives the total of 5,540,700 visits per year. It does not seem likely that Chicago is singular, and until we have trustworthy evidence to the contrary, these facts form almost the only basis for estimating the extent of these practices.