I'm sure porn stars and prostitutes still enjoy sex. Otherwise, that would suck.

^Actually, most prostitutes hate their costumers & have grown to hate sex. Like how an alcoholic grows to hate alcohol. They become ashamed and hate it. A hooker at the Crazy Horse Too admitted this to author Ben Mezrich for his novel, Bringing Down The House. ;)

I'm quite sure they are bored shitless by it. It's just a job and I have read many times that porn stars are working on auto pilot and disconnect themselves mentally from the task in hand.