Clonedzero wrote...
you misinterpret "acting straight", that only means "being physically attracted to the opposite sex and showing signs of it". which you can completely still do if you're wearing super tight jeans and singing showtunes.
Sorry for misinterpreting. However, sometimes people don't show any signs, preferring to keep their sexual preferences to themselves. Maybe they find it rude to talk about it too much, or maybe they're just not interested in discussing it.
Wrex, for example, never says a single thing about his taste in romantic partners. The closest we get to that is his comment that fighting alongside women has a "different flavor" because his people don't do that. Meanwhile, Tali didn't say a damn thing about sex until ME2, nor did Garrus.
Wrex could have been a real flamer and you would never have known.