chapter  1
The Biology of Sex
Pages 20

The starting point for the study of sex differences is biology. But biology also demonstrates the identity of male and female – their basic similarities, the continuity in their development. Far from falling into two discrete groups, male and female have the same body ground-plan, and even the anatomical difference is more apparent than real. Neither the phallus nor the womb are organs of one sex only: the female phallus (the clitoris) is the biological equivalent of the male organ, and men possess a vestigial womb, whose existence they may well ignore until it causes enlargement of the prostate gland in old age.