Aside from the opening scenes that lead him to the doctor's office, which are far too long and really add nothing to the story, this was also full of ick and incredulity.
Never mind that we're supposed to believe a college aged man could be so naive about a medical exam, there was a little too much time spent on leaking and splashing urine, and the enema dominated far too much of the story. I really struggled to believe he managed to hold the enema for so long while being vigorously masturbated and, I'm sorry, but if he's laying on his side on a medical table, a bucket on the floor is not going to help when that enema lets go. Somebody is going to be cleaning that wall.
Gross.