The CIA force-fed detainees through their rectums, and called it a “well acknowledged medical technique.” One detainee suffered from an anal fissure and “symptomatic rectal prolapse”—when parts of the rectum protrude from the anus and are visible outside the body.
UPDATE: James Taranto settles it. South Park:
“Cartman has a ‘brilliant’ idea, reasoning . . . it could be possible that eating food through the rectum can cause defecation through the mouth. The other boys (especially Kyle) think it is stupid and disgusting, and Cartman bets him $20 it will work.”—Wikipedia.org summary of “Red Hot Catholic Love,” aired July 3, 2002