I hate to blow anyone's bubble, but most porn stars thet do escort work, seem to get by more on their name that what service they are gret at, so most of the time your paying for the thrill of being with a porn star, rather than getting the PSE.
Most of these women tend to do what is said to them by the director, and they seem to be enjoying it because they are told to show that side, its not always the case that you are going to get the same treatment as you see on the porn videos.