It was revealed as a set up
Although pretty convincing on Eminemenems part.
( magnum, Wed 3 Jun 2009, 14:47, archived)

apparently it was rehearsed
but they didnt tell him just how nude sacha baron cohen was going to be.. he wasnt upset with the stunt, just with getting that much manarse stuffed into his face.
( Azra3l Lubrication Persuasion and Brute Force ™, Wed 3 Jun 2009, 14:50, archived)

Hairy muff

( broadsword, Wed 3 Jun 2009, 14:52, archived)