Night Rider, did you actually see the escort in question and this happened, or are you supposing that this is what would happen, or did this happen to you with a different escort?
I am pretty sure that what you are describing probably does happen, but on the other hand, there are escorts out there who provide a very good service and where the all-night engagement includes about as much sex as any normal man can handle.
However for those who want to push it and risk a heart attack, there are less expensive ways to commit suicide than trying to imitate a machine.