It's a fiction, not a moral treatise.

Quills
Directed by: Philip Kaufman
Main Cast: Geoffrey Rush as The Marquis de Sade, Kate Winslet as Madeleine "Maddy" LeClerc, Joaquin Phoenix as The Abbe du Coulmier, and Michael Cain as Dr. Royer-Collard

I was astonished by this film. It was my first time to actually watch it during our Media Law class. Some scenes were too exposed but it fits the story well. This movie is definitely not for MINORS. Even I was looking away while watching some scenes that were not too good to the eyes. Marquis de Sade was a remarkable writer! You'll understand why if you get the chance to watch it. =)