Christina Aguilera and her husband Jordan Bratman go skinny dipping at late hours to keep alive the flame of their two-year marriage. But it seems that the new parents’ sexy sessions have infuriated the neighbors of their $11.5 million mansion in Beverly Hills, who reportedly have to listen to their ‘happy noises’. A source tell America's Star magazine, "They don't just splash around - they laugh, scream, swear and make sexy noises. We're happy that they're happy, but we wish they'd keep it down a bit. There are a lot of old people who live around here, and they don't like noise after the dinner hour."