Justin Timberlake and Mila Kunis Get Naked: "It Was Kinda Great"

Find out what happened when the singer-actor had a look at starlet's "bits and pieces"

Mila Kunis is one lucky lady.

Not only does she have a steamy bedroom romp with Natalie Portman in Black Swan, but she gets to do the nasty with Justin Timberlake in Friends With Benefits.

What's it like bumping and grinding with J.T.?

MOVIE PHOTOS: Snapped on Set

"I can't complain," Kunis told me this weekend at Hollywood's W Hotel, where she was promoting Black Swan. "It's not like I had the hardest two months. It's not like I was, 'Uch, I have to go to work and have simulated sex for two weeks. Darn it.' It was kinda great."

But as we've all been told, movie sexing ain't nothing like the real thing.

"Wait till you see the gag reel," Kunis said. "It was all laughter. He's very funny. I think he knew I was going to be a little uncomfortable because he would be seeing all my bits and pieces so his way of making me comfortable was just to make me laugh…It was just very goofy."