2. Psycho
(Lesson: Never Steal) There's not much to say about this one because it's pretty obvious that theft is behind the death of poor little Marion Crane. The shower scene is a metaphor for how she tries to "wash away" her guilt from the crime, and that's the real reason why the shower scene has become so infamous. If you're not willing to fess up and try to make amends, even if that means going to prison, then don't try to purify yourself in the Bates Motel. A little bird told me so.