Manga#Game To Kanojo [English, Uncensored], by Fujiyama

“As our whole presentation has shown, the progress which manifests itself in these successive forms is connected with the peculiarity that women, but not men, are increasingly deprived of the sexual freedom of group marriage. In fact, for men group marriage actually still exists even to this day. What for the woman is a crime, entailing grave legal and social consequences, is considered honorable in a man or, at the worse, a slight moral blemish which he cheerfully bears. But the more the hetaerism of the past is changed in our time by capitalist commodity production and brought into conformity with it, the more, that is to say, it is transformed into undisguised prostitution, the more demoralizing are its effects. And it demoralizes men far more than women. Among women, prostitution degrades only the unfortunate ones who become its victims, and even these by no means to the extent commonly believed. But it degrades the character of the whole male world. A long engagement, particularly, is in nine cases out of ten a regular preparatory school for conjugal infidelity.

We are now approaching a social revolution in which the economic foundations of monogamy as they have existed hitherto will disappear just as surely as those of its complement-prostitution. Monogamy arose from the concentration of considerable wealth in the hands of a single individual – a man – and from the need to bequeath this wealth to the children of that man and of no other. For this purpose, the monogamy of the woman was required, not that of the man, so this monogamy of the woman did not in any way interfere with open or concealed polygamy on the part of the man. But by transforming by far the greater portion, at any rate, of permanent, heritable wealth – the means of production – into social property, the coming social revolution will reduce to a minimum all this anxiety about bequeathing and inheriting.”