I truly believe this is how a large(r) percentage of men would behave to blow off a bit of steam, especially while remaining faithful to wives & girlfriends who aren't putting out, were it not for society's valiant effort deliberately misinterpreting the nuance in male sexuality.
I have this uncle that when I was at his house, would watch porn and jerk in front of me. I'm sure he was doing it to tease me, but I believe he didn't even imagine that his feet made me hornier even more than his dick