I spent a little time in Germany as a schoolboy learning German, and it's a country I knew very well, spent a lot of time in. I knew the history very well. I've always wanted to do a piece of work about the post-war period, of one sort or another.

When I got married, my mother was very surprised. She said: What on earth is going on? I thought you were gay?

The culturally specific, in particular, the American porch play that American writers have cherished and loved for many years in terms of their new writing, has seemed to have very little relevance to a much more fast-flowing, abstract, experimental drama that has been emerging in [the UK]. The porch play, not to mention that thing of, Oops, I wasn't loved enough by my father, somehow didn't have the relevance in this country.

With journalism, films always have to be to do with some personal statement of your own. As a general rule, I resist that. In the States, a question that kept coming up was this: how can you, as a man, talk about three women?

I think it's absolutely fascinating that in Berlin the parliament can discuss actively the role of their soldiers in Afghanistan because is it still possible, literally, for a German soldier to take up arms.

You have to trust your own instincts about what is appropriate and what is not appropriate and trust your own feelings about what you can and can't show for yourself, and it'll be different for everybody.

I'm not really a director for hire. You read these scripts and go, 'This is a really great script, but Paul Greengrass would make this so much better than me.' I usually say, 'I know who would be good for this. It's not me.