Prince Charles is hopping mad over a German newspaper's publication of a clandestine photograph that catches him in the buff. The daily tabloid Bild splashed a color photo on today's front page, reportedly taken while the heir to the British throne vacationed at a friend's villa in southern France. Charles is seen wearing only a folded white bathrobe draped over his left shoulder. Curiously, Bild raved that the 45-year-old, tanned prince was "hunky like a Greek statue." Readers who want to know all may be disappointed that the grainy picture -- a blown-up print snapped from afar -- offers only a hint of His Highness's lower region.