Reason doesn’t often work when you’re trying to get children to behave. Hyperbole often does. So a lot of parents have told their kids outrageous lies in order to elicit obedience. You probably heard several such statements as a child. You know the ones.

http://ktar.com/95/1819760/Moms-admit-to-lies-used-to-manipulate-the-behavior-of-their-children