P's know the difference between right and wrong and they know they are lying.  They just lie so much they lose track of what is true and what is not.   And they chose to do wrong because why not?  They have no guilt or fear?  Normal feelings we all experience.   They only begin to feel when they get caught.  Then they feel bad because they can't control others any more and they now get controlled by the authorities.  So that is the extent of how much they have to offer others.