When I first started writing, there was no way I’d write a sex scene. That just seemed impossible. That’s why in “Fight Club” all the sex happens off-screen. It’s all just a noise on the other side of the wall or the ceiling. I just couldn’t bring to write in a scene like that. So one of the challenges with “Choke” was I wanted to write sex scenes until I was really comfortable just writing them in a very mechanical way.