§ 98
In animals simultaneity is gained by the same mechanism as that which arranges for cross fertilization of some plants, i.e., the time for the impregnation is short or instantaneous in one sex and long in the other. In animals the female is ready only for a short time, the male always. The female animal is prepared by physiological changes, the female human by psychical development. In humans the female is supposed by some men to be always ready until by their ignorance and diabolical treatment they find their women never ready. That which occurs in an animal is a purely physiological heat. In women it has dwindled into almost vestigial proportions in comparison to the psychically caused excitement. This psychic element is enough, however (if rightly understood and managed by the man), to make it safe to say that a woman may always be made ready, even though by her own constitution and upbringing she may never know it and so not admit it. The female animal never suffers the male’s approaches except in her estrual period. Man has it in his power to cause in woman the psychic analogue of the estrus at any time.