The Reservoir Dogs actor, who appears to bed hop between mistresses in his new TV drama Boardwalk Empire, insists he doesn't enjoy intimate scenes with co-stars like Paz de la Huerta and Kelly MacDonald, because he's still shy when it comes to the bedroom.

He tells Playboy magazine, ""I'm very modest. I've always got something on, and I don't get aroused.

""My motivation for going into the movies was definitely not the sex scenes.""