The inability to marry always makes a deep impression on the mental life of woman, and in many cases also gives rise to burning desire and tormenting yearning of an erotic nature. The unmarried miss life’s true goal and fail to enjoy the natural exercise of their functional capacities; alike in the cultured lady and in the poor working woman who has failed to marry, the thoughts and feelings return again and again to her own condition in a self-tormenting manner. The physical and mental disadvantages entailed by sexual gratification when obtained by an unmarried woman, one who, according to modern phraseology, “wishes to secure her natural share of the joys of love,” and who regards voluntary chastity as “a sacrifice to meaningless prejudices”—need not be more particularly described. Free love, moreover, is the most important disseminator of gonorrhœal infection. “In any future commonwealth,” says _Runge_, “in which marriage is abandoned in favour of the general practice of free love, the human race will be overwhelmed by gonococci in a manner now hardly conceivable, and the reproductive capacity in both sexes will be diminished by the results of gonorrhœa to a very serious extent.” Frequently enough, also, free love leads to prostitution, which at the present day is so widely prevalent. Various reasons have been suggested to account for the increase of prostitution. Among these are: The growth of modern industry, with the consequent aggregation of the population in large towns; the decline in the marriage rate; the postponement of marriage; universal military service; the freer mutual companionship of the sexes; and many others. At any rate, the fact would appear to be established, that in the case of woman the determining cause of prostitution is hunger rather than the sexual impulse. The worst paid classes of workwomen are shown by official statistics to furnish the largest number of recruits to the ranks of prostitutes; and it is during times of deficient employment that the number of women practicing occasional prostitution increases. Thus, material need is the most important of the causes of prostitution.