I'm Ace but it doesn't mean I can't f*ck a guy or girl. I think what you're saying tends towards a more phobic interpretation of bisexuality. Essentially this is saying that bisexuality this says bisexuality is not based on who you're sexually attracted to but on who you f*ck. It 's like the people who accused a straight man of being homophobic because his girlfriend all of a sudden acquired a body that caused her to be read as a guy and he couldn't accept it. But if this situation was completely reversed with a gay guy's lover instead and the gay couldn't accept it that previous logic means we'd have to call the gay guy straightphobic. When he's not. T.
you can't expect that every dialogue is going to follow the sense that everyone is aware of their sexual nomenclature, so i don't see a problem with male characters in yaoi saying "you're my first man" or "i only like you" even tho i know it's problematic. it implies an EXISTENT bissexuality but this is just not a concept that this type of men being portrayed in manga would simply use.
and now *it's time for you to get flabbergasted* they're usually hets with no common sense! what do you expect from people who just got out of their "het confort zone"?
i read a manga a while ago where the uke goes "are you gay?" then the seme goes "no" then the uke again "bi, then" and he goes "probably" which was honestly a miracle in comparison to the great amount of "uke-suffering-for-a-``straight´´-seme-who-happens-to-be-fucking-him" kind of plot existent.