By Imy Brighty-Potts Natalee Holloway’s murderer Joran Van der Sloot continues his playboy ways behind bars in Peruvian prison despite his damning sentence or 28 years. Van der Sloot was just 17 in 2005 when 18-year-old school senior Holloway vanished while on a class trip to Aruba and as the last person to see her alive, with conflicting versions of events, he became the prime suspect, pleading guilty. But, despite the violent nature of his crime and the fact he is serving a whopping 28 year sentence in Peru, the killer continues to have sex with multiple women due to a surprising system appr…