Well, that's a bit more cynical than I am (usually) prepared to take things. But I have often wondered what it is, specifically, about men or masculinity that leads various cultures to develop the tradition that only men are to be seen as effective religious leaders.

Is it something to do with some "magical quality" that the male body possesses? Or is it a "deficiency" that supposedly exists in the womb or female body? Considering that intersex and transgendered have not generally been considered male priest substitutes in male-dominated cultures, it must be the former.