 For example, not all women lactate, while some men do.Similarly, Suzanne Kessler, in a 1990 survey of medical specialists in pediatric intersexuality, found out that when a child was born with XY chromosomes but ambiguous genitalia, its sex was often determined according to the size of its penis.Thus, even if the sex/gender distinction holds, Lorber and Kessler suggest that the dichotomies of female/male and masculine/feminine are not themselves exhaustive.