London: Comic actor Seth Rogen was so sure that he would have to strip in the new movie "Zack and Miri Make A Porno", he shaved his hairy back.

Although the "Knocked Up" star was ready to get completely naked with co-star Elizabeth Banks, director Kevin Smith chose not to ask the two to strip on screen.

Contactmusic.com reports Rogen saying: "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."