You should be slapped round the face if you're getting f***ed on camera and are not making any effort to enjoy it.
Just watched Filthy Fuckers First Time Amateurs and I have to say it's one of the crappest pornos I've ever seen. There was one girl in particular though (the third scene) She was just laying there lke she was dead when Pascal was f*****g her. Pascal was nervously looking at the camera (he could obviously tell she wasn't enjoying it) and she was too. It was awful and should have been cut from the film and she shouldn't have been paid.