True, when it's a supposedly lesbian wanting to have sex with a man it's probably always on purpose, then we discover she was actually bisexual instead of lesbian, of course only reason they never said that is to satisfy male fetish of sleeping with a lesbian, it's aparently what they did with in Hannibal, but when it's man I guess it's more in the lines he just didn't find the right woman, unless it's two man wanting threesome with a woman, then it's obviously fanservice for female audience to self insert themselves.
That's the sort of thing that really annoys me about writing bisexual characters. While there are some good bisexual characters out there, a lot of the time their sexuality seems to have been sort-of shoehorned on as a way of making them not really gay. Like if they were written as bi then that's a whole different thing, but it seems that much of the time they're made out to be lesbian for fetishistic reasons. Does that make sense?
And it's situations like those that are annoyingly common that give bisexual characters something of a bad rep in general. Of course, I may be totally wrong about this, that's how I see it.
