Odd, I really do not understand why people think it is a question of sexual identity. Heck, there is nothing about sexual identity to be bothered about. I'm bi, I'm happy. Deal. See, simply and easy, no problems! ... This whole mess is about gender... what is between the ears. ... Is that such a foreign concept that they simply can't grasp it without it being beat into their skulls with the proverbial two by four?
Naw, I bet it would only take a bit of chatting with them really, presuming they wanted to listen anyway.