Flying into Egypt for a whirlwind promotional trip, it would be pretty safe to assume Paris Hilton didn't read a guidebook beforehand. Spending a few days in Cairo, where she was being paid to appear at the Automech 2010 car show, Hilton traded in her usual shopping and partying exploits to soak up some of the tourist sites. But it appears no one had given Hilton any advice on the local customs, after opted for a revealing, backless maxi dress with plunging neckline.