According to the Miami Hurricane, there were several urban legends about Stallone's time at Miami University and why he didn't graduate, despite being just three credits shy of a diploma. They include Stallone bringing a fake bazooka to class, beating up teachers to train for "Rocky" and making a pornographic film on campus.
Stallone did film a softcore skin flick, but he made the film, "The Party at Kitty and Stud's," in 1970 while he was in New York City. It was later retitled "The Italian Stallion" after Stallone found success with "Rocky." At the time, Stallone was broke and sleeping in a bus station.
"It was either do that movie or rob someone because I was at the end — at the very end — of my rope,” he told Playboy in 1978, as recounted in Rolling Stone. "Instead of doing something desperate, I worked two days for $200 and got myself out of the bus station."
It also wasn't really X-rated.