I am currently watching The Anatomy of Sex on the Discovery Channel. And the question is posed: “why are women’s bodies designed for sex, when [by pregnancy, or any of a number of other factors], they are not in a position to conceive a child?

The answer seems obvious: to keep their men around. You might be ashamed to admit it, guys, but would you be true to your woman if she was only receptive to sexual activity when she was fertile?