Twenty-three-year-old box-office babe Keira Knightley recently refused to have her boobs enhanced in publicity photos for her new movie “The Duchess.””She is proud of her body and doesn’t want it altered,” a source told Britain’s Daily Mail last week.So for all of you lesser-endowed ladies take note: Keira’s proud of her chesticles and thinks you should be, too.And she’s not the only one.