12/21/2011 03:51 am ET Updated Feb 19, 2012

'Chelsea Lately': Patton Oswalt Terrified By Sex Scene With Charlize Theron (VIDEO)

Sex scenes are intimidating for any actor, but it was worse for Patton Oswalt. On "Chelsea Lately" (Weeknights, 11 p.m. ET on E!), he explained how quickly his thought process changed at the prospect of his sex scene with Charlize Theron in 'Young Adult.' Chelsea Handler suspected it was a big deal, "because I know that you've never had sex with anyone like that," she said.

"I'm about to do a love scene with Charlize Theron," was Oswalt's first and more exciting thought. "But then the logical part kicks in and says you're about to be pretty much naked next to Charlize Theron." Oswalt compared his physical appearance to that of a snowman made out of skin.

"It's gotta be the most physically perfect woman on the planet?" he lamented. He'd have preferred to be next to the likes of Michael Moore or John Goodman in their underwear.

Check out "Chelsea Lately" weeknights at 11 p.m. ET on E!

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