Not many of us have had the experience of filming a movie -- but from the multiple films that we've watched, it's obvious that acting isn't easy.
And these Hollywood stars agree that trying to film a sex scene is one of the hardest things to do.
From celebs such as "50 shades of grey" star, Jamie Dornan to hotties like Mila Kunis, filming sex scenes are just plain uncomfortable.
Read about what they had to say about them in the gallery below. Story via Izismile.