This thread really became MESSY at one point. And as a gay man, i just wanna express my opinion in regards of bisexual men settling down exclusively with woman (i haven't dated any bisexual or really any man on my life, so feel free to debunk my opinion/theories)
What im gonna say may sound redundant, but i genuinely believe that the reason of this happening is because our society favour heteronormativity. We all know it's easier to be in a straight relationship, you don't have to risk any insults from biggots by showing public affection, you won't have to fight to get married in any country at all and we all have been exposed to the normalcy of straight relationship (be from our parents, media or really any person) meanwhile, us gay people don't really have any reference of what a "traditional" gay couple/family should look like, and if we have, it's most likely tainted by traditional gender roles. Let's also take in fact that we can't have children (not counting trans men.)
So by this point, i have already accepted that us fellow gay/bi men are simply at a disadvantage compared to women if we wanna date a bisexual men, and more than blaming them for not wanting to be with us (i have seen many nasty comments from my fellow gays to bisexual men, shame on you) i think it's more fair to aknowledge that they're just playing by society rules.
My conclussion is that is easier to be in a straight relationship, therefore it's easier for bi men to end up with women. But regardless of what comments came out of my coconut head, don't let this message make you reject any possible partner just because he is bi. Im pretty sure there's plenty of bisexual men that are open to start a serious relationship or even a family with another man, i already heard a couple of stories in this thread
.