At 12, Pov knows the sexual geography of the riverfront area in Phnom Penh like the seasoned prostitute he has become. The four middle-aged Frenchmen in front of us? “They like girls,” he explains, giggling. “Small girls.” The sun-blackened and tattered woman a few yards away? She will rent her daughter for the price of a hamburger. If I don't like boys he can fetch girls. Otherwise, in exchange for the meager contents of my wallet, Pov and his three barefoot, scruffy friends will guide me to a safe hotel and stay the night. “What would we do there?” I ask. “Up to you,” he says.