We also knew [ me and Ewan McGregor] that, on a practical level, if there was going to be that much sex in the film [Young Adam] - which there clearly had to be because sex is the meat and potatoes of the thing - it had to be varied for the audience, because it's important to keep the audience living in it.

We're living in a new Beat time, in my view. And it's very difficult for us to hang on.

I would say, and this sounds like a rather immodest thing to say, but the truth is it's probably the most amazing thing of all, it's pretty much exactly what I thought we were going to make, what I hoped we'd make.

The work is different in the sense that I haven't had to travel round the world raising money, or work from the genesis of the project. But the collaboration feels clear always, it's sort of my drug, I'm in it for the conversation. The conversation's the most important part of it.

This film [Doctor Strange] kind of takes that everyday boring reality and really bursts it wide. So we talked a lot about that. In many ways there's something very practical about this world, the Kamar-Taj. It's - You know, we all look like samurai warriors, but actually there are iPads everywhere and there's a feeling that it's a practical possibility for this modern world that the Doctor Strange universe is functioning, and that we know it and it's around the corner for all of us.

I have no problems with the NC-17 rating. I want more NC-17 films. More adult cinema!

I mean, even in terms of the Marvel universe, this [Ancient One character] is going on a side street into a major piazza that Marvel hasn't even been to before, because it's all about creation and not so much about destruction and forestalling destruction, it's about your mind.