The basis of all stereotypes is “The Law of Small Numbers,” i.e., what is true for one must be true of all. A more effeminate man on top, or a very masculine dude on the bottom, is inconsistent with the stereotype, so it is dismissed as wrong.
I am curious about what seems to be — but perhaps isn’t at all — the growing interest in straight guys getting pegged. Now men are being receptive and women being insertive.
Has this been going on a long time and I just didn’t know about it? Or have straight men just discovered the pleasure in their prostates?