A reader writes:
You neglect female masturbation. Women and girls do it, too, and there’s no sperm production — or any other physical reason — to compel it. Moreover, according to your correspondent’s views on Christian doctrine, there really shouldn’t be any reason for the clitoris. It’s strictly for pleasure, the sin organ. See the equatorial belt of Africa for where this kind of logic leads us.
Ah, yes: clitoris, purpose of, p 86. My favorite index entry in The Conservative Soul, where this question is directly addressed. You can download it onto your Kindle for $9.59.