Oh you sweet, sweet, summer child.
A) It's a game, with many unrealistic aspects, not least of which it exists in a reality where one can just transform your gender with a pill, and a large portion of the game is involved with serving a breeding kink;
B) Yes, of course there are guys like that that exist even IRL. Not common, they probably don't announce that to the entire world for you to hear about. There are guys who have chopped their dick off and posted it to fetlife for gratification, if you think there aren't ones with full fledged breeding kinks then you're incredibly sheltered.