Paul Provenza's film centres on one joke but it is probably the most offensive, filthiest joke in the world, including incest, bestiality, necrophilia and extreme under-age sex - the punchline is the title of the film. Nearly 100 comedians talk about its construction and context and then tell it in a variety of guises - Kevin Pollack imitates Christopher Walken telling it, Matt Stone and Trey Parker have the kids from South Park trying to understand it and even the demure Carrie Fisher joins in.
The Aristocrats is a Film programme that first aired in 2005 and has been classified a 18 certificate.
