Don't give a fuck about gender, which I thought was obvious from the context Ballad. You're the one who decided bisexuals can't be attracted to trans people and pan people are, that's far more centring trans people than pointing out that it's dehumanizing to make out they aren't included in "two sexes". Gender =/= sex, humans have 2 sexes.
Pan is a gender-centric idea of sexuality, mainly around Anglo-Western ideals of gender. Bisexuality isn't.
EpitomeofAnOldBattle makes some great points, and I think there is something to this cultural idea that we all end up with men, as if sexuality must be centered around men.
Statistically, bi people are more likely to end up with a person of the other sex -- the dating pool of people of the other sex willing to date us and be socially accepted doing so is significantly larger. There are those like febfems (female-exclusive bisexual females), but that many people know bi women with men doesn't mean anything about bisexuality - most people pick a person, and it's going to be one sex or the other.
I think the flip with men is in part of the different hook-up cultures, but also because they're more encouraged to be quiet about it if they're not actively looking to date men at the time and when they are dating men they're encouraged and largely seen by others as gay no matter what they say.
My spouse was warned not to be out for fear that 'if shit does down, they'll put you against the wall'. I've never had such a warning, even growing up in the American Midwest - in part because it's more likely I'd be fetishized compared to him.
I wouldn't go out with a guy that was BI because every guy I have known that was ended up with men in the end
I do believe in male bisexualty , I just personally wouldn't want to take the risk
The risk of my sexuality being fetishized by straight men was why I chose to stop dating them. That to me was a far greater risk, having seen the damage time and again, especially if they try to go poly (the straight man, bi woman is practically a cliche where the man at least will be nasty). The intra-community drama and certain headfuckery when dating lesbians is more annoying than the risks of dating a straight men, but was also part of why I would only consider relationships with other bisexuals.
Comparing those relationships to other bisexuals of both sexes (including my nearly 20 year marriage to a bi man), I think I made the right choice for me. I can see why people would choose not to date bisexuals, it's spoken about often enough, but I rarely see talk about the risks bisexuals take when we get involved with people of other sexualities.