But what about the really rough guys they actually do employ? I find myself put off by a lot of the men (and women) in porn because they're just too disgusting to watch. I don't fully agree with their conclusions. If it was a blank slate avatar that you could project yourself onto, then I think the guys wouldn't be heavily muscled and aggressive, I think they started out as an ideal that viewers could project themselves into rather than blank them out.
This. And a lot of the time the faces and noises they make are unintentionally comical and ridiculous, which makes it kind of hard to get into. Relevant: http://www.collegehumor.com/video/3593576/safe-for-work-porn
I think a lot of heterosexual males tend to go for girl on girl porn just so they don't have to see some beefed up idiot grunting. At least that's what I hear.
And it was all for science. :P
Maybe it's the act itself that is selling most? Such a strange thing. Are other animals interested in watching porn?