Kate Beckinsale says she just sorta blanks out and doesn't feel a thing when filming sex scenes in front of her husband, director Len Wiseman.
From Contact Music:
Kate Beckinsale insists there are no problems when her husband [Len Wiseman] has to film love scenes between her and another man. She says, "The sex scenes and the kissing and all that stuff is by far more awkward for the third party coming in, the second man."
"I'm OK with it. I think, as a woman, it's possible to be fairly enigmatic. We don't have any movable parts; you just sort of blank out and nobody can tell what you're really thinking. It's much harder for boys."