I was bullied badly as a child for being very effeminate, but kids (or at least kids here) don't really equate femininity with homosexuality at that age, so I just got "sissy" and the like. And by the time I was old enough that people would see feminine mannerisms and assume I was gay, I had learned to be on my guard, and was so paranoid about showing any part of my real self to others that I probably ended up doing a rather good job of being a "normal teenage boy".
In recent years, though, I've grown much more confident about who I am, and a lot more open about expressing my femininity. And I had a whole bunch of people (mostly girls I was friends with, like Amalina said) ask me if I was gay in the space of my first year of university. Not in a hostile way, of course. Just a curious one.