LOS ANGELES, June 22 - How do you sell a movie about the dirtiest joke ever told? [Snip] "There is no violence or hostility of any kind" in "The Aristocrats," explained Penn Jillette, an executive producer of the film, who is better known as half of the magic act Penn and Teller. "We want to say: 'We have 150 really funny human beings in the back of a room making each other laugh, but they're going to be swearing, and if you don't want to hear swearing, you better not come in.' " Mr. Jillette; the comedian Paul Provenza, who...