'The Piano Teacher'
Speaking of WTF, The Piano Teacher is also another movie that explores kinks and fetishes that, honestly, a lot of people are into. It's about a severely sexually repressed woman, a piano teacher, who begins an affair with one of her students. She has a list of sexual demands that she'd like him to agree to, but he just can't. However, after reaching the breaking point, he gives into her fantasies... and there are some doozies on that list.