It's this simple law, which every writer knows, of taking two opposites and putting them in a room together. I love anything with Cartman and Butters at the same time, it's great.

It's all based on saying the shocking thing. We used to have a great time going to Hollywood parties and saying 'I think George Bush is doing a great job.' We'd clear out the room. I used to love it.

To me, every episode is like a song, and every season is like an album. There's that part of the day when you first get the idea and you say, "This could be really funny." And you sit down and you write it. There's just something that happens there that doesn't happen when you really give it a lot of time beforehand.

So we're considering doing a new Christmas album, because there's been Christmas episodes since then, and maybe finally do the version of 'The Most Offensive Song Ever' with lyrics intact.

Me and Matt love to argue, but in general our sense of humor is pretty much alike.

I find Mormons adorable.

In terms of the creative side of it, it's really been a thing where you come up with the funny stuff is usually at a bar or out talking to people or whatever.