What would my first sergeant do if he came across me and another girl getting it on? He'd want pictures. He'd want to join in. He'd want me and this other girl to double-team him right then and there. On the other hand, since most heterosexual men are homophobic and sexist, most straight guys figure gay men will treat them the way they themselves treat women- that is, like sex objects. And this freaks them the fuck out.