...and I do think there are more bisexual than homosexual folk, that would make biological sense, since bisexual people could still reproduce...
Yeah, but lots of homosexuals have had and are having babies. Only in the last half century have gays had social freedom to live with partners and not enter hetero marriage, and lesbians have skills with turkey basters.
I'm actually bi, and only now looking to get pregnant since I entered a lesbian marriage (none of the dudes I've dated have been parent material, but she is), and there is a HUGE community of lesbian moms in my city. The gayby boom is actually driving the gay marriage movement.
But I'm rambling-- what I want to say is that as someone who's bi (and queer and pan) and attracted to a broad diversity of non-binary genders, I would be EXHAUSTED if I tried to date one of every gender I've been attracted to. Butches and femmes, genderqueers, boys, girls, in-betweeners, off-the-maps...
I have been happily promiscuous, and have called myself a slut. Didn't mean I wasn't picky.
I also had a boyfriend (in a triad) who told me he'd have a much harder time if I found a new boyfriend than a new girlfriend.
And then I ended up leaving poly, getting monogamously married to a woman. I guess the problem with a OPP was that he didn't expect me to swing all the way to a no-penis-policy. But he *knew* I was bi.