Everybody has to make a living. When he was still a struggling actor (check him out as a subway mugger in Woody Allen’s Bananas!), Sylvester Stallone made some… interesting choices. One of which was starring in a softcore porn film called Part at Kitty & Stud’s.
The film never saw the light of day (or saw just a few screenings), until Rocky hit. Suddenly the people who owned Party at Kitty & Stud’s saw the opportunity to make a buck and they rereleased the film as Italian Stallion. Subtle.
I’ve never actually seen the film but I have enjoyed the trailer many, many times. It’s really one of the pinnacles of exploitation trailer making.
By the way, the original negatives AND the worldwide rights to Italian Stallion http://cgi.ebay.com/Sylvester-Stallone-Sex-Film-/260691056596 - for the next hour or so. Hurry over and buy a piece of history. You could make some money on this, I wager.