I have been thinking and thinking and thinking and pondering ever since finishing reading However Long The Night (Aimee Molloy), and obviously it had a very profound effect on me. This is the scenario I have come up with, based upon the African women seeming to be at one about "the tradition" going back thousands of years:
Men discovered (by some fluke accident no doubt) that they could magnify by a great deal the pleasure they enjoyed from the sex act if they removed the foreskin from their penises. Being men, this became a matter of prime importance to them, and they made a religious ceremony of it for all males at puberty. Semitic tribes, in particular the Jews, made this an individual rite of passage, while African tribes tended to induct annual age groups into this ritual. With some it started at birth, while others waited until around age twelve. I mean, the woman who first said "If men could get pregnant, abortion would be a sacrament" had it so very right.
With so much additional pleasure available to men, they wanted more and more and more sex. They sought this in a number of ways, along the way making some of these such as plural wives and rape of enemy women legal, while sowing your oats afield and incest were religiously forbidden and slightly frowned upon among your peer group. They also wanted to preserve the property aspect to having wives, and African men discovered they could accomplish this end by taking away the sexual pleasure experienced by females. They did not care whether their "property" enjoyed or hated sex, just so long as they made it available to their husband owners. So they arranged that there be operations with sharp tools to remove clitorises. Then, having accomplished ascertaining their women would not seek sexual pleasure and their children would truly be theirs, they arranged that women, rather than men, would be the ones to perform these important rituals. That way no man would look upon the private parts of their future brides, and it would become a tradition that no woman who had not had this genital mutilation would be acceptable as a bride.