I don't aestheticize anything. I don't even use lights. The working girls do one thing all day: They make themselves pretty. That's their job and their money. In a way, I had the best makeup artists, hairdressers, and art designers in the world.

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.

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.

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.

On one hand, they [prostitutes] don't struggle because it's simply their life. In Mexico and elsewhere, once they get out of these places [brothels] they have a pretty square life.

Sometimes the presence of a camera is like opening a door, because many people want what Andy Warhol called "15 minutes of fame." But prostitutes don't want that.