I've made many documentaries, but prostitution was the hardest in terms of gaining the trust of the people being filmed.

Prostitution will always exist in every society, so I believe in a fair trade. Open the doors for women to earn their money without having pimps. The worst thing is to criminalize it, because then you open the doors for pimps, criminals, and trading.

La Zona is such a closed area, a dangerous, outlaw area. My time in the Zona was a time outside of society, almost out of the real world. And the girls there had such a sense of irony and sarcasm. They were also really interested in my film. They'd be like, "Thank God we live in Mexico, because our kind of prostitution has a heart. We wouldn't want to sit behind a glass cage or be sold by our own mothers. We have free will."

The most important thing is to find people that you enjoy - friends that you enjoy playing music with.

In Bangladesh a prostitute normally wouldn't even undress for a man. He pays, she pulls up her sari, and he's done in 20 seconds.

Mostly I take photographs in times of research. Whores' Glory was shot in 30 days, 10 days for each segment, but the research for each part lasted a couple of months.

I've made many documentaries, but prostitution was the hardest in terms of gaining the trust of the people being filmed.