Maybe their Sexual Orientation is Heterosexual, but for their line of work, they are willing to have intercourse with peope of the same sex, but that is just their Sexual Conduct it's just their line of work, and we all know that most people's work don't align with their interest (it's a rare occurrence). As others say, it's mainly for the money, because maybe the pay is lucrative enough for them that they agree to do it (tbh, I think I would have sex with a woman if I will get paid enough). I mean, I think labels don't matter to them, so long as they themselves know their Sexual Orientation, and also as long as their partners are okay with it, then they have no problems.
But then again, maybe they are gay, and porn producers are preying on our fantasies. Like, seriously, I admit that if I could turn a straight guy gay, that would be such a power trip. That he is willing to be gay for me (and being gay isn't really all rainbows and sugar in our society), it's such a wonderful feeling (not that I've felt or done it ;D). It just gives us hope that the hot straight guy we have a crush can could actually like us back. It's some powerful shit hahaha
Whatever the case, I just respect it. If they're straight, then kudos to them for being so open-minded about gay porn. And if they are gay, then kudos to them for giving us fuel to flame our fantasies :cheers: but that's just me hahaha