GoFish, it's pretty bad. That number doesn't actually surprise me.
My daughter had a young man in one of her classes that was being tormented by the instructor. The instructor had a pet name for this kid & the kid just took the abuse and humiliation. My daughter stood up in a fury one day and threatened to report the instructor, which effectively ended it. It happens but everyone is not aware of their options, that or it's just more difficult for the guys to report embarrassing crap like that. I dunno.
The military HAS cracked down on public displays of affection, but they can't always know what goes on behind closed doors. Sometimes it's an abuse of power situation & sometimes it's just a person being who they are. Some people sleep around. It could also get you boot-kicked out of the military and is a stupid risk to take. Most wear the uniform with honor but you know there are always some the rest would like to personally boot kick out of there, just as in any organization.
Oh, and as to what sexual orientation someone is...when you are in a combat situation, that is not an issue. You do what you are trained to do, period, and they are trained well.