I remember reading about this. I believe The Italian Stallion is so heavily edited, there isn't even any Stallone nudity or sex scenes left. Party at Kitty and Stud's is almost impossible to find. Once Stallone hit it big, his people did their best to destroy all copies and they played a huge part in making sure the sex scenes with him were gone.

That being said, man. Sly was pretty hot back in the day.