By George, there was only one man who could hold his own opposite Audrey Hepburn in My Fair Lady: Rex Harrison. There was a time when critics considered Harrison the best actor in the world—not that his ego needed that boost. Despite his talent, his reputation behind the scenes was less-than-savory. Not only was he difficult to work with, but he was also a die-hard womanizer. Harrison left a trail of broken hearts in his wake—sometimes, with dire consequences. Pin a white rose on your lapel for these fatally charming facts about Rex Harrison. 1. He Thought Pretty Highly of HimselfThe man we kn…