Boasting about sex with underage girls is not the brightest thing to do on Facebook. Just ask Robert Nickson, 27, who was busted by Philly cops after crowing on his site about his 14-year-old fiancée. The couple, who described themselves as "engaged," posed together in a photo on Nickson's Facebook page, even though they were worried their illegal relationship might draw police attention. Nickson has been charged with statutory rape, aggravated indecent assault and corruption of a minor after the girl told cops the two had sex four times, reports the Philadelphia Daily News. (More crime stories.)