Jim Carrey might seem willing to do anything for a laugh but the funnyman confesses that he was downright embarrassed performing one particularly raunchy sight gag in the over-the-top comedy Me, Myself & Irene.

The same man who pushed himself naked through the rear end of a rhinoceros sculpture in Ace Ventura: When Nature Calls says he actually felt humiliated pretending to be breast-fed by buxom actress Shannon Whirry on the set of Irene.

"It's very rare when I get in to a place where I actually am like kind of humiliated," he tells TV Guide Online. "It was so embarrassing to me."

"I was embarrassed for the girl and she was fine with it," he says of Whirry, whose curvy body has graced many a low-budget flick. Carrey was so red-faced, in fact, that he found himself apologizing to the actress between each take. "She was like, 'Yeah, whatever.' "

Although the scene takes place on a park bench, don't expect to see many extras strolling by in the scene. "When it came time to do it, I had to empty the studio," he says. "I couldn't do it in front of anybody. It was like really that embarrassing to me."