If I can use a personal example - my son is non conforming in many ways. He likes nail polish and floral patterns and is really quite flamboyant in manner. He's also, as far as we know at this stage, heterosexual.
A boy at the church youth group keeps calling him gay. The boy is gay himself, so I think there's some odd psychology at play, but that's by the by.
My son is only a preteen boy, so does not have the wisdom of years to assess this rationally, so he's going to go a number of ways. Either he's going to baulk at being persistently called gay as a pejorative when he isn't, and start toning down his self expression, or he's going to be stubborn and just be himself, which is obviously the response I am encouraging.
It's also, sadly, possible that this will propel him into some difficult introspection about who he is, and if we were in a certain religious setting, that could lead to some very mixed up conclusions.
I'm hoping that in my lifetime, or at least his, society will get to the stage that you can be any orientation you please without judgement or comment, and that if you are a straight male who likes floral patterns and big arm gestures, no one makes assumptions or judgements either. But I'm not going to hold my breath.