It is frequently insisted that responsibility of man to woman in the matter of monogamic relations, is ethically the same as that of woman to man. This has not been the view of mankind generally, and it is distinctly negatived by the facts in the case. The marriage relation is clearly a contract in which the consideration on one side is support and protection, and the consideration on the other is monogamic wifehood, or the definite paternity of children and their care and education. The immediate reason why particular men and women marry particular women and men, is, or ought to be, love and affection; but these admirable sentiments, are the offspring of natural conditions of sex, without which woman, and especially man, would not marry at all. And these natural conditions are clearly satisfied by the maintenance of the contract as above described. In order to further enforce this position I merely refer to the well-known fact that man cannot commit marital infidelity in the same sense that woman can, on account of his physical diversity. His unfaithfulness introduces no new blood into a family, and makes no defect in the inheritance, as does the same act on the part of the woman. The woman is in a position of trust, precisely like the responsible officers of a bank. It is in the power of both to defraud those who trust them. Hence it is that woman has been always held to stricter account in this matter than man, and always must be. For this reason the jealousy displayed by husbands is more justifiable than that displayed by wives; and the result of marital infidelity on the part of wives is usually more disastrous to the offending parties. It is in consequence of these facts that there exists some difference in the ethical feelings of the sexes on this question. It is undoubtedly true that there are more women willing to live in polygamy than men willing to live in polyandry, in spite of the verbal objections that women make to such a system in modern times. I do not now refer to promiscuity, in which the affections are in no wise concerned. In this everyway inferior relation, men are the most numerous offenders. It is for the reasons above stated that women are more monogamous in their tendencies than men. Not only does the question of support and protection during child-bearing and at other times make it more to their interest to be so, but they are more inclined to attach themselves to particular persons than men, on account of their superior affectional endowments. This is an inevitable result of their occupation in the family and with the family for countless ages, and is as much a product of their evolution, as is the superior rationality and self-control of the male sex.