Authorities never pressed charges against Russian billionaire and new Nets owner Mikhail Prokhorov after arresting him in 2007 on suspicion of hiring high-class call girls to entertain his guests in the Swiss Alps. But now, Prokhorov himself admits that he has some experience in the flesh trade. “I had sex for money once. I was young, hotblooded, curious. The representative of the ancient profession was brilliant and read Nietzsche in the original,” he recently told the magazine he owns, the Russian Pioneer. “And she gave advice on how to be successful in life: ‘Keep your back straight and don’t fuss.’ I have learned not to fuss, but I am still working hard on the spine. There’s still time.” The 6-foot-8 bachelor skipped the NBA All-Star Game and its surrounding hoopla in Dallas, as the 4-48 Nets limp toward the worst record in the league’s history. Prokhorov was in Vancouver for the Winter Olympics.