I always want to laugh at the sad stuff. You don't need to laugh at the other stuff. I'm not numb to these things. I still go into really dark periods about Sept. 11. I think it's kind of like bullies. Bullies are just scared and thin-skinned, so they have to become bullies as a kind of survival tactic. I think comics are that way, too.
I think that's always how it's been, ... I certainly didn't invent it. Look at the people who are kind of the funniest cultures, they're the cultures of the people who have been the most oppressed, black people and Jews. Not that they're the only funny people, but culturally, it comes from the pain, you know?