It's interesting because the Thai king says there's no prostitution in Thailand, it doesn't exist, so the prostitutes don't pay taxes. They can work other jobs if they want and put away money, maybe leave when they're 40.

In the Bengali language, there's not a real word for blow job. They call it "doing the ice cream."

Whenever a man enters the realm of prostitutes he's always regarded as a possible customer. If you enter as a woman, you're regarded as somebody who could be in the same place. Being a man brings the perspective of flirtation.

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

There's always this problem in society where people know they need these places for social peace, but the fundamentalists want to shut them down. Sometimes that's for economic reasons, because they want to build a supermarket there. The imam will hold a prayer and say let's get rid of the girls, but on the other hand they're all going there.

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."

You can become an alcoholic working in an office in Los Angeles. It's very easy to say because I do this shameful job I take drugs or drink, but the real reason prostitutes take drugs and drink is because prostitution is a party area. It's not about desperation, it's the surroundings.