Season 8, Episode 9: "The Abstinence"

I just remembered where I left my retainer in second grade.

I'll see you later.

- Hey, I need some more matches. - What is going on in there?

I met some people smoking on the street...

...so I invited them up to my apartment to smoke.

- Why? - Somebody had to.

Just because a person's a smoker doesn't mean he's not a human being.

These people aren't gonna let themselves be flicked...