WHAT'S IT ABOUT? Comedic bigwigs tell different versions of a particularly lewd joke.

HOW LEWD EXACTLY? Well, it involves tales of incestuous orgies, dead granny intercourse, flaming elephant willies and pooping into gaping mouths. Make your own mind up.

WEIRDEST VERSIONS: The mime artist acting out some of the above. Plus Penn & Teller demonstrating an erupting  bell-end with a soda bottle.

PERFECT FOR: Alienating in-laws. Does the trick better than a steamy bottom burp in your girlfriend's mother's face. (Presuming she's not like the mother in the joke, who's a big fan of poo).