I can see where both sides are coming from here and I have also been a victim of endless penetrative sex. Don't get me wrong I enjoy it but to a point. I get very frustrated when a client wants nothing other then to get inside of me, just to pound away as hard as they can for the remainder of the hour doing nothing to switch it up or keep me involved. It then seems that they themselves become clock watchers waiting and making sure they get that last thrust and then finishing with not even a minute to spare. There isn't a climax or anything just the same thing over and over and it does get very painful. I never want to sound like the person who wants to leave early or just get it done. It gets to the point though when it becomes very obvious that this person is simply pounding away on you and intentionally taking forever just to get their moneys worth, with no intention of making sure you are turned on in the slightest way. Those are the calls that I do not return.