Tell a hillbilly joke at a smart dinner party and everyone will laugh.

ECONOMIST: When pig jokes go badly

He's comfortable at home, and still manages to laugh and joke with a stream of regular visitors.

BBC: NEWS | Health | 'I've always wanted to die at home'

You wouldn't laugh during a conference where the boss says quarterly earnings are at an all-time low but you would laugh if the boss told a funny (or at least he thinks it's funny) joke.

CNN: Dealing with tears at work

It wasn't just self-congratulatory laughter at a high-brow joke. (OK, maybe a little.) I also had a laugh at myself: I've tried for so long to understand Philip Glass, and all it took was a one-act parody?

WSJ: Parsing a Playwright's Universal Language