There was once a magic mirror in a ladies room in a bar.  If one stood in front of this mirror and tells the truth, one is granted a wish.  However, if one tells a lie, *POOF*, you are instantly swallowed up by the mirror, never to be seen again.

A redhead of questionable looks walks into the Ladies Room and stands before the mirror and says, "I think I'm the most beautiful woman in the world."

*POOF*  The mirror swallows her.

Next, a rather large brunette stands before the mirror and says, "I think I think I'm the sexiest woman alive!

*POOF*  The mirror swallows her.

Then an absolutely gorgeous blond comes in and stands before the mirror and says, "I think..."

*POOF*