Never Live It Down: The "Butter Scene" was not only this for Bertolucci but for Brando as well, seeing as how he went along with the whole thing while Schneider was completely unaware of what was going on. Even Brando would come to regret his involvement in that scene, among other aspects of the film.
No Such Thing as Bad Publicity: On the other hand, the controversy over the above mentioned scene, along with the other sex scenes and the behind-the-scenes treatment of the main leads, didn't stop the film from being a critical success.
The sex scenes and subject matter got it banned in certain countries.
Many people hated its treatment of actors, Maria Schneider and Marlon Brando, by the film's director, Bernardo Bertolucci. Schneider said that making the film was her life's only regret, that it "ruined her life", and that she considers Bertolucci a "gangster and a pimp". In 2011, Bertolucci denied that he "stole her youth" (she was 19 at the time of filming), and commented, "The girl wasn't mature enough to understand what was going on." Schneider remained friends with Brando until his death, but never made up with Bertolucci. She also claimed that Brando and Bertolucci "made a fortune" from the film while she made very little money. Brando said to Bertolucci at the time, "I was completely and utterly violated by you. I will never make another film like that". Brando refused to speak to Bertolucci for 15 years after the production was completed. Much like Schneider, Brando later said he "felt raped and manipulated" by the film.
The Woobie: Jeanne; she's in two relationships and neither seems particularly good for her. Hell, in a meta-example, her actress also counts, considering her... let's just say extreme displeasure in making the film.