The Negative Effects of Cousin Marriage on Sexual Desire

There are some cultures that highly value cousin marriage. You're not going to be raised around them as if they were siblings for one and for two. The logic of natural selection for species like ours is that it behooves a man to be more promiscuous than a woman on average. It pushes men towards promiscuity, relisited to women. But there's also a decline that, oh, you know, women gossip, more than men or men do this better than women. Wherever you ask people how many sexual partners in your life? And wherever you ask, you find men want more.