This ongoing coexistence which makes life sensational. The eyes have this ability to flip around what they see from one second to another, to see something as an object, and then as a design. That's really liberating, and I try to convey that in my work, that your eyes are free and you are free to use them.

For me, a good portrait shows the fragility and humility of the person, and at the same time a strength, a resting in themselves.

The picture of the guy pissing on the chair was a picture I had to do. I had the idea of this absurd act of pissing on a chair rather than in a toilet or on the ground, and this minimal act being so transgressive, even though no major harm is done.

I heard this wonderful quote - "Only the brave show what they love." It's so-embarrassing to approach somebody and say you want to look at them. But without that risk taking, nothing can happen, so I have to make myself vulnerable. What I think is the unifying aspect in people that I like is that they have a sense of their own vulnerability, and I respond to that.

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.

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.

Big ideas don't make them selves known as big. They begin with the little, ridiculous ideas that most people would discard or reject. Every successful picture I've done has really been based on taking a very flimsy, fleeting little idea, grabbing hold of it, and taking it seriously.