Sean Penn is a friend of mine. We hang. We chill. We kick back. Many people say to me, "Oh, he's such a big movie star, it must be very glamorous and special to hang with Sean." But it's not. Sean Penn is a regular guy, a guy like you and me, although more like me. He likes the things that everyone likes: hot dogs, cold beer, sense memory exercises. Like this one time he said, "I want you to imagine the worst thing that ever happened to you," and I did. I thought about the time my father was...