Just being a woman, sometimes you can watch porn and know that what the guy is doing actually would be annoying rather than a turn on, but the girl is really having to earn her "acting" pay by pretending that it really turns her on.
What is with a guy shoving his whole hand in a girl's mouth, for example? How would that turn either person on? I'm perplexed by some of these things.
What is worse is that men watch porn and get really pathetic ideas about how to please a woman. "Hey, I'm the man. I'm going to shove my whole hand in her mouth. She is going to love this!"