Liars do it too, to sell the lie.
Well another Trumpster just told me Trump looks people in the eyes all the time....
But as someone who is certified a body language and facial expressions, I can tell you that deceptive people do not look people in the eyes in a natural way and not consistently..... and it’s usually more of a stare... but they always give off involuntary clues.... because it’s very difficult to look someone in the eye and be deceptive on purpose.... usually tell tale signs are there.