Photos: Hollywood takes on porn —
For his directorial debut, Joseph Gordon-Levitt decided to make a movie on a very adult topic: porn. The filmmaker stars in "Don Jon" as a guy who finds the girl of his dreams, but is having a hard time letting go of the ladies he's come across on his computer screen. We'll see how well this movie performs on Friday, September 27 -- for now, see some of Hollywood's other hits and misses with porn.