compulsive liars!!!

Compulsive lying is driven by a few things: low self-esteem, the need for attention, and other, more serious issues. The thing about compulsive liars is that they general are best at lying to themselves. When someone is that deep into it, they are convinced that their version of the truth is really the truth. There is no way to help someone recognize a problem, when they don't realize it's a problem.

http://www.discovery.org/scripts/viewDB/index.php?command=view&id=991