By Leah Rozen
January 30, 2006 12:00 PM

The Aristocrats

($29.99) The title is the punch line to a spectacularly dirty joke that comedians have been telling each other for years. In a fascinating documentary, scores of comics (including George Carlin, Paul Reiser, Bob Saget and Sarah Silverman) riff on, deconstruct and analyze the joke, like jazz musicians exploring a melody. Extras: Fun commentary by co producers Paul Pro venza and Penn Jil lette, outtakes, and Phyllis Diller telling a dandy Monica Lewin sky joke. (Not rated)