Guardian: The enema within
This article about colon-cleansing is a masochistic read to be sure, but you'll never think of pork roast, fast food or that elusive marble in quite the same way again.

People are constantly appalled yet fascinated by the idea of cleansing, and for some masochistic reason, demand the grim details between starter and main course. As they wait for their medium rare fillet or pork Dijonnaise, they crane forward to hear more...