In the scene where Rhet Hengst is bent over the toilet receiving anal intercourse from Marco Paris, a closeup from the side with his head pointing left shows a glory hole in the stall wall, through which you can see the other actors, but based on which stall the other actors are in, his head should be pointing to the right, meaning the film for this shot was reversed.
When Tom Judson is down on his knees giving Jacob Slader, Blu Kennedy, Justin Gemineye, and Nick Parker oral sex, his penis is out of his fly in a few shots, but later, Kennedy asks him how big he is, and he replies, "Only one way to find out." He then stands up, undoes his fly, and pulls it out again.