Sexuality as attraction
I don't think experience matters.
Sexuality is attraction.
You may be MORE attracted to men than to women.
That's why Kinsey Developed a Scale for sexuality.
Yeah, I would have to agree with Crabby Lil Me... I don't think it matters if you actually act on your desires or not. For example, let's say there is a man, age 45, who has been married to his wife for 20 years, and has 3 kids. If he often fantasizes about sexually being with men, or if the idea of male homosexual sex really turns him on, I would say that he is at least bi (possibly gay if he is totally in denial), even if he has never acted on it in real life or doesn't intend to.
But, this does bring up a good point about how people self-identify.... I think the self-identification thing is a whole other issue. There are a lot of women who identify themselves as 'straight' although they have had sex with women on multiple occasions when they were drunk, and might do it again. I know one woman who has had sex with women on various occasions, but I don't think she would really have a relationship with a woman... I think she considers herself to be straight and doesn't really go around saying she's bi, although she doesn't exactly deny it either.
Which brings up the issue of some bi people looking to one gender for sex only, and only having romantic relationships with the other gender.
I think this is the more common Kinsey scale:
0 Exclusively heterosexual
1 Predominantly heterosexual, only incidentally homosexual
2 Predominantly heterosexual, but more than incidentally homosexual
3 Equally heterosexual and homosexual; bisexual.
4 Predominantly homosexual, but more than incidentally heterosexual
5 Predominantly homosexual, only incidentally heterosexual
6 Exclusively homosexual
I think in-depth surveys would be interesting, about the percentages of women and men who are on each number.
Me myself, on the above I'd be a 3, and would have relationships with either gender.