Aside from the apparent presumption that “normal­izing” surgeries are necessarily good, I suspect that ethicists have ignored the question of intersex treat­ ment because like most people they assume the phe­ nomenon of intersexuality to be exceedingly rare. It is not. But how common is it? The answer depends, of course, on how one defines it. Broadly speaking, intersexuality constitutes a range of anatomical conditions in which an individuals anatomy mixes key masculine anatomy with key feminine anatomy. One quickly runs into a problem, however, when trying to define “key” or “essential” feminine and masculine anatomy. In fact, any close study of sexual anatomy results in a loss of faith that there is a simple, “natural” sex dis­ tinction that will not break down in the face of certain anatomical, behavioral, or philosophical challenges.4