Speaking of shit, worth bringing this story up again from an interview with the Jodorowsky's Dune director.
Jodorowsky was going to shoot part of the film in Algeria. They spoke to the Algerian government, and the Algerian army was going to play extras. Jodorowsky was looking for who was going to play Jessica, and he wanted a strong, beautiful woman, not a weak dainty woman. Someone with a real spiritual strength. He saw a movie with Charlotte Rampling, and thought she would be perfect. They sent Charlotte Rampling the script, and she agreed to meet with Jodo before she had read the script, and in the script, there is a scene where a character named Rabban the Beast, part of the Harkonnen army. In order to insult Duke Leto, David Carradine, Rabban the Beast gets his army, the Algerian army, to pull down their pants in front of the palace and shit. So there’s going to be a scene of 2,000 extras defecating at once. So here’s Charlotte Rampling, she agrees to meet with Jodo, she gets the script, she reads the script, and she says, “I can’t be in a movie where there’s 2,000 extras defecating on screen! I need to be in a movie that people are actually going to see! Who the hell is going to see this movie?” Jodo said, “It was a great disappointment for me"