I don’t know if it’s genetic, but I know people just sort of “are who they are” if that makes any sense. Sometimes it just takes time to figure that out.
There’s the alpha-male jock who turns out to be a closeted homosexual power bottom, the meek, nerdy guy who finds his groove and becomes a leader, and the guy who thinks he’s a ladies man, but really just wants the ladies to take him with a strap-on..
I think it happens to everyone; some earlier than others, some later.
I’ve always had submissive tendencies, but like SubHub I tried to fight them and it didn’t do anyone (especially me) any good. Once I embraced them, I can’t begin to explain the contentment I feel at finally being who I always was.