“On the one hand, then, in the reproductive functions proper—menstruation, defloration, pregnancy, and parturition—woman is biologically doomed to suffer. Nature seems to have no hesitation in administering to her strong doses of pain, and she can do nothing but submit passively to the regimen prescribed. On the other hand, as regards sexual attraction, which is necessary for the act of impregnation, and as regards the erotic pleasure experienced during the act itself, the woman may be on equal footing with the man.”