What percentage of the female population are bisexual?

It's really hard to say. I think the percentage of women who would actually self-identify as bisexual is small (but still larger than the percentage of men who self-identify as bi). However, I've found that many women (including myself) identify as "bicurious" or "heteroflexible" or just "open," meaning that although they're mostly attracted to guys, they wouldn't object to a relationship with a woman. Other women may self-identify as straight, but feel the same way.

So, I imagine the percentage of women who would be open to a same-sex relationship is really quite high, especially among women who are 18-30 who tend to be more open and liberal in general. I don't have any actual stats for you, sorry, but there you go.

Now, the percentage of women open to a threesome with another woman, if that's what you're getting at, may be very different. I, along with many of my bisexual or otherwise "open" friends, am not into that kind of thing. So, just because a woman is into both guys and girls doesn't mean she wants both at the same time.

That's an interesting question. I have no idea on statistics. For me, personally, every crush I've ever acted on has been on a guy, but if I was attracted to a girl, I'd go for that. So I guess I'm not *really* bi, since I'm really attracted to guys most of the time. But beautiful women are still awesome to see.

As far as the definition of bisexual goes, I'm not sure. But I'd say almost half the women that I've known who have been candid with me have said that they have at least thought about having an experience with another woman.