I don't think a director should have any kids. I don't even think it's good for your physical health. Even guys in their 30s look exhausted because directors never get enough sleep. What I do is stressful enough.
It's funny though speaking of fathers and sons because me and John Goodman played father and son like five or six years ago in the film 'Death Sentence ' and I got back with him again in 'Inside Llewyn Davis.'
