Porn work is hard work, no pun intended. For a guy he has to maintain an erection through multiple shoots and positions. Get fluffed by girls who aren't in the action. Then fuck the star over and over again and again. Plus he's expected to cum on demand while shooting ropes 6 to 12 inches across the actress. For the girl she has to endure hours of fucking a cock in her pussy. Regular bedroom sex has the cock in there an average of 7 minutes. On set she may be fucked for a couple of hours, under hot lights, in multiple positions. She'll have plenty of lube applied to her pussy as it will become rather dry after a while. Then there's the cock size she gets to take. Long wide penetrating cock pushing deep into her cervix, sometimes painfully deep. All through this she has to maintain like she is actually enjoying this. That's why they call it acting. It isn't real.
