This act of piss, which can be considered sexual by some, a pleasurable experience, is at the same time total disrespect. I had once asked a friend to do this picture and he totally refused. So I carried the idea around with me for years. When I was invited to do a Honcho shoot, I approached Phillip, who was the barman at The London Apprentice, and fortunately he knew who I was. He had a copy of my first book, and that broke the ice. At the end of the shoot with him, I realized I could ask him to do this picture. I had waited four years to do it.

My staged work looks so real that people actually take it for documentary. But, in fact, that is my intention, to disguise the manufacturedness of it. Half of my work, or probably more than that, is staged.

Books have this function that help me to understand the work I've done, to wrap it up. Once it's done, fortunately, it doesn't mean there's closure. Change in my work happens not in revolutions - it's more evolutionary.

This coincided with the fall of the Berlin Wall and Europe coming closer together, and nightlife and techno and ecstasy culture seemed like a very powerful panEuropean movement.

Whatever pictures are put into the world, the balance needs to be readdressed, it needs to be observed. That's why I am also really questioning what a lot of photography has done since I began. I am not saying because of me, but I mean, photographing some friends partying and publishing the pictures meant something else in '92 than it does in 2011. And I find the younger generation is not questioning this at all today.

I see my practice as picture making. Whatever is available, I use.

The true authenticity of photographs for me is that they usually manipulate and lie about what is in front of the camera, but never lie about the intentions behind the camera.