In 1974 I nearly got into a fistfight with some early academic feminists in a restaurant when I casually alluded to a hormonal element in sex differences. It was utterly unacceptable at that time to think or say such a thing... If you have any doubts about the effect of hormones on emotion, libido and aggression, have a chat with a transexual, who must take hormones medically. He or she will set you straight.