CINCINNATIOut-of-the-loop moron Karen Lenz stunned everyone within earshot Monday when she said Brittany Murphy was still dating Jeff Kwatinetz. 'Isn't Brittany Murphy that teen star who's engaged to that agent?' said Lenz, who has apparently been in a coma since May 2004, when Kwatinetz and Murphy split. Sources close to the dumbbell said she's so retarded, she wasn't even aware that Murphy attended a guest screening of the film Bad Education last month, escorted by an anonymous hunk of arm candy. 