If guys and girls are allowed to wrestle against each other, then the principal can't say that you can't wrestle against other guys. But if you are attracted to guys, then yeah, they can make a rule against it. I know it sucks, but a lot of students and parents will not be comfortable with the idea of students sexually attracted to each other doing wrestling moves on each other. In gradeschool, we weren't allowed to wrestle against boys once we were in 7th grade, because it wasn't really appropriate. I was bigger and stronger than a lot of the boys, so it had nothing to do with ability or strength.