This is the way I see it. Not all gay guys, but many of them creep me out. My lawyer is gay, but he's not "flaming" and you wouldn't know he was gay until he told you or he mentions his boyfriend. No gay lisp, no limp wrists, no fairyness. He shoots guns, goes hunting, etc. I respect him, and I think he'd be a good soldier.
HOWEVER, and this is a big however, there's no way I would feel comfortable showering with him knowing he is gay. If he wasn't able to suppress his homosexual tendancies and remain straight, how is going to act/feel showering with 20 nude, built soldiers?
I'm sorry but showering next to a dude with a raging hard on because he is around other dudes is a complicated situation. It doesn't mean I would feel any less safe with him on the battlefield, but it's in living situations, etc. that would be weird. I'd just rather not know.
I mean, how would you expect me (ME, TECHBOYJK) to feel and act showering with 20+ sexy soldier ladies?? Certainly my body chemistry would react to that situation.