A Darwin, a Schiller, a Keats, though all men capable of the strongest sex emotion and of the most durable sex affections, would probably be untouched by any emotion but horror, cast into the company of a circle of Bushmen females with greased bodies and twinkling eyes, devouring the raw entrails of slaughtered beasts.
But leaving out even such extreme instances of diversity, the mere division in culture and mental habits, dividing individuals of the same race but of different classes, tends largely to exclude the possibility of at least the nobler and more enduring forms of sex emotion.

The highly cultured denizen of a modern society, though he may enter into passing and temporary and animal relations with the uncultured peasant or woman of the street, seldom finds awakened within him in such cases the depth of emotion and sympathy which is necessary for the enjoyment of the closer tie of conjugal life; and it may be doubted whether the highest, most permanent, and intimate forms of sexual affection ever exist except among humans very largely identical in tastes, habits of thought, and moral and physical education.

(In Greece at a certain period (as we have before noted) there does appear to have been a temporary advance of the male, so far in advance of the female as to make the difference between them almost immeasurable; but he quickly fell back to the level of the woman.) Were it possible that the entrance of woman into the new fields of labour should produce any increased divergence between man and woman in ideals, culture, or tastes, there would undoubtedly be a dangerous responsibility incurred by any who fostered such a movement.
But the most superficial study of human life and the relation of the sexes negates such a conception.
The two sexes are not distinct species but the two halves of one whole, always acting and interacting on each other through inheritance, and reproducing and blending with each other in each generation.

The human female is bound organically in two ways to the males of her society: collaterally they are her companions and the co-progenitors with her of the race; but she is also the mother of the males of each succeeding generation, bearing, shaping, and impressing her personality upon them.
The males and females of each human society resemble two oxen tethered to one yoke: for a moment one may move slightly forward and the other remain stationary; but they can never move farther from each other than the length of the yoke that binds them; and they must ultimately remain stationary or move forward together.

That which the women of one generation are mentally or physically, that by inheritance and education the males of the next tend to be: there can be no movement or change in one sex which will not instantly have its co-ordinating effect upon the other; the males of tomorrow are being cast in the mould of the women of today.