Knocked Up plays fun on the dreaded unwanted pregnancy between a slacker and an aspiring TV host. What makes Knocked Up so funny is Seth Rogan's character, Ben. His dimwittedness makes for lots of silly scenes as he doesn't know how to behave around women and is inexperienced with children. While the story is generic and predictable, it doesn't really matter because it isn't the focus of the film. The gem in the film is all of the moments of stupidity that can't help but crack us up.