The Episode: Not an episode, but The Simpsons Movie. The Gag: During the infamous opening sequence in which Bart skateboards naked to school (after Homer dares him to, of course), he rides past Ralph, who appears dumbfounded (as usual) before quipping, "I like men now". It's a perfect realisation of how wonderfully naive Ralph is, and also how dementedly weird to pick up on something he clearly has no idea about. And this is before Bart then gets his own moment to shine with some totally unexpected nudity...