My wife’s gaydar is 99% accurate.
If there’s any doubt, watch what they watch, while they’re unaware that you’re doing that. You’ll know what they’re about in ten minutes if there’s a crowd around.
Guys have a way of looking at women, even ugly women that is unique. Their body language changes. It becomes, for lack of a better word, protective.
Gays, misanthropes and misogynists also have a body language change but in the other direction. They don't like us and you can feel it.