TIME: You've said the three sex scenes in the film were harder to shoot than the martial arts scenes in Crouching Tiger. Why?
Lee: I'm a shy human being. I don't make pornos so I'd never done that before. To verbalize the feelings and lead the actors through those acts and witness how much they devote to it, it's very painful. Usually we don't go there. I don't intend to go there again. After half a day's shooting we had to stop, it was so exhausting. You're so hyper... emotionally, sexually, everything is so charged up.