A Dirty Shame Trivias
The scene where Sylvia changes her clothes in the back of the cab is based on a true story. John Waters once had to change clothes in the back of a cab on his way from an airport straight to a book signing.
In order to play a part of a stripper with enlarged breasts, Selma Blair had to be fitted with a pair of prosthetic devices.
Before running out of gas, car is turned off and in park but is still driving.
When the MPAA were asked what would needed to be cut to obtain an R rating, they replied that if everything the MPAA objected to were to be removed, the movie would only be 10 minutes long.
Paul Giamatti was originally meant to play Vaughn Stickles, but dropped out to play in Sideways (2004).