Why tell the truth-you might get in trouble if you made a mistake. Why not just lie and take the chance you won't get caught. If you're not happy, it's the other person's fault. They are supposed to make you happy. If you're unhappy, make sure the other person is, too.
Life is perfect.
Relationships should always be perfect. People have to be perfect. If you're caught in a lie, blame it on someone else, change your story and compound the lies-it really helps get people confused, including yourself. Money equals power and control. Make sure you control the money or use theirs.