Funnyman Seth Rogen was so convinced he'd have to bare all in new movie Zack And Mary Make A Porno he shaved his hairy back.

The star was fully prepared to get naked with co-star Elizabeth Banks, but director Kevin Smith chose not to ask the pair to strip onscreen.

Rogen tells WENN, "I shaved my back just in case. I went fully bare, like a two year old. I was ready. I didn't want to be too real for the world. I don't think the world is too ready for a hairy back in a love scene. Has there ever been a sex scene with Robin Williams? People don't want to see that. That would border on bestiality."

(This news article provided by World Entertainment News Network)