After seven years of research, Sevely concludes that a hitherto unsuspected symmetry exists between male/female sexual anatomy and sexual responses. Men, she claims, have a clitoris (within the penis), while women have prostate glands (along the floor of the urethra). Furthermore, the vagina (not the clitoris) is the male counterpart of the penis; and, like men, women experience ejaculation following orgasm. In addition, the female orgasm involves not only the clitoris, but also the urethra and the vagina. She bases this theory on anatomical research, medical literature and--in the case of female ejaculation--on a controlled study of an unspecified number of women. This study showed that sexual emissions through the urethra from the female prostate can amount to as much as one-quarter of a cup. She also believes that this new knowledge can be used by couples to heighten their sexual experiences. The publishers aver that these findings are as ""myth-shattering"" as those of Kinsey and Masters and Johnson. Maybe: further research seems indicated. In any case, it's refreshing to learn that the sexes may have much more in common that hitherto suspected.