However if one of the "players" is out and out homosexual
Are you saying if one of the "boys -- as children or youth" is an out and out homosexual? If so, I guess I'm not sure how old an out and out homosexual child or youth would be and how they knew at such an early age that they were homosexual.
In my kids group, adolescents all, (8th-9th grade) there was one boy who sought out other boys for simulated homosexual sex. He would tug and pull at our jeans trying to do more than simulate. And later, as an adult he frequented the homosexual bars in SF. So I would say Yes, at adolescence he "knew" what he wanted to do and to whom.
In other situations we were playing "spin the botle" in the heterosexual sense. We were learning sex the tried and true way, in the dark while our parents thought us playing hide and seek.