Help With The Name Of A Movie?

Me & My Friend Were Talking About Clerks 2 And The Mentioned The "Donkey Scene" And I Remembered This Movie I Once Saw With A Bunch Of People At A Party & This One Guy Was Raped By A Donkey...(i know,it sounds weird,but it was a really funny movie) So If Anyone Has ANY Clue As To What Movie I'm Thinking Of Please Help.

(Its An Older Movie)