White lies keep social dignity intact and are far more prevalent than most people realize. Several studies have found that an average person is lied to from 10 to 200 times a day - mostly just to keep a conversation going, to avoid conflict, or to establish a connection with someone.

A liar often smiles subtly while telling a lie; it's an unconscious expression of his delight in getting away with a whopper.

Like it or not, we are all liars. Thank goodness. Imagine going through life where everyone is completely honest: 'Those shoes... look like something out of an early Cyndi Lauper video.' 'Your daughter... looks like the spawn of Honey Boo Boo and Elmer Fudd.'

Contempt is the only asymmetrical expression in the muscular facial system: Disgust, fear, happiness, surprise and anger typically express themselves symmetrically. Contempt is marked by one lip corner pulled up and in a dismissive sneer.

Good liars are skilled at reading others well, putting them at ease, managing their own emotions, and intuitively sensing how others perceive them.