House: But you haven't answered my question, children.
Rory: Uh, question?
House: You remember. Tell me why I shouldn't just kill you both now.
Amy: Well, because... Rory, why?
Rory: Because... killing us quickly wouldn't be any fun. And you need fun, don't you? That's what Auntie and Uncle were for, wasn't it? Someone to make suffer. Had a PE teacher just like you.