Although completely physical, the male is unfit even for stud service. Even assuming mechanical proficiency, which few men have, he is, first of all, incapable of zestfully, lustfully, tearing off a piece, but instead is eaten up with guilt, shame, fear and insecurity, feelings rooted in male nature, which the most enlightened training can only minimize; second, the physical feeling he attains is next to nothing; and third, he is not empathizing with his partner, but is obsessed with how he's doing, turning in an A performance, doing a good plumbing job. To call a man an animal is to flatter him; he's a machine, a walking dildo. It's often said that men use women. Use them for what? Surely not pleasure.
Eaten up with guilt, shame, fears and insecurities and obtaining, if he's lucky, a barely perceptible physical feeling, the male is, nonetheless, obsessed with screwing; he'll swim through a river of snot, wade nostril-deep through a mile of vomit, if he thinks there'll be a friendly pussy awaiting him. He'll screw a woman he despises, any snaggle-toothed hag, and furthermore, pay for the opportunity. Why? Relieving physical tension isn't the answer, as masturbation suffices for that. It's not ego satisfaction; that doesn't explain screwing corpses and babies.