When Old People Talk They Use Old Expressions But Mark Levin is Still Right

Why is Lying through your TEETH a really bad thing? Is like smiling with your teeth still touching, but hoping the listener believes it anyway. A Fake smile is one in which the smile isn't real but a halfhearted smile to cover up a lie? Mark Levin used this expression when telling the truth about liars. Not going to look it up. Insincere smile. Silly and Fun.