They've been hauling 10 tons of Chinese door frames across the country for about 8 hours straight and the nicest thing these guys have seen so far is Esther from IHOP. So, I can't really blame them much for their behavior.
These porn producers, always so preoccupied with if they could, but never stopping to wonder if they should. I can't even imagine how awkward this scene must of been to film for everyone involved.
It's only 10 minutes into the all night sex party and this douche is about to bust his nut after a 30 second blowjob. Not wanting to end the night early, he awkwardly death grips his penis attempting to cease climax.