Kind of sucks because two of my relatives do it, which makes it hard for me to come out.
My mom said once something along the lines of that nobody's really bisexual, they're just really gay and just switch over occassionally. She played softball and has tons of lesbian friends, one that got married to a man and had kids and is a lesbian now, and she probably takes that as being no "middle ground".
And then my sister said something just like that, where she was like "I don't care if a man calls himself bisexual, that just means he's gay". And she's also really not-nice sometimes about gays "I just don't like it when they flaunt it in my face", and stuff.
And I dunno, it's like, I don't want my family to think I'm just going through a phase. I don't think people often understand how hard it is to be taken seriously when you say you're legitimately bisexual. People dismiss it because they think you're just experimenting or something, which actually is true in a lot of cases, but certainly not MINE.