Personally I only watch lesbian porn or solo girls. I don't know what it says about the imaginations of people if you need to see another guy to imagine yourself having sex... do you always view yourself in the third person? Maybe you hire some poor Mexican to follow you around with a full length mirror all day.
If I am watching porn I want to see something that arouses me, girls that I want to have sex with. Two girls naked together can be better than one because that's two girls I want to have sex with (I don't know why but if a girl is a lesbian it makes me want to have sex with her more, even if I might not normally find her particularly attractive... I am sure that says something about my psyche...).
Seeing a guy on the other hand is not arousing, it takes me out of the fantasy. I don't know about you but I would not have sex in the same room as another dude. So seeing a guy who isn't me is not sexy at all. It doesn't bother me in itself, but it isn't sexy. Also seeing a girl having sex with some other guy makes it feel even less like I could have sex with her, 'cause you know, she's already occupied.
My two cents on why I also don't understand hetero porn.
If I am watching porn I want to see something that arouses me, girls that I want to have sex with. Two girls naked together can be better than one because that's two girls I want to have sex with (I don't know why but if a girl is a lesbian it makes me want to have sex with her more, even if I might not normally find her particularly attractive... I am sure that says something about my psyche...).
Seeing a guy on the other hand is not arousing, it takes me out of the fantasy. I don't know about you but I would not have sex in the same room as another dude. So seeing a guy who isn't me is not sexy at all. It doesn't bother me in itself, but it isn't sexy. Also seeing a girl having sex with some other guy makes it feel even less like I could have sex with her, 'cause you know, she's already occupied.
My two cents on why I also don't understand hetero porn.