M. loves to play on our perception. He was once a misguided artist at King Nightmare's court, but now he's out in the open, blatantly drawing you bigger in the mirror, giving you weird skin conditions and deep set eyes. He makes the shape of your head look funny in photos. But what is your real face, if all you see are his artworks? Some people fall ill thanks to him. They see someone completelly different in the mirror. Somebody they hate and think, it's them. Poor souls.
How to fight it
I do not own any mirrors except for looking around corners. Don't trust mirrors. I sometimes figure that M. is actually drawing on the retina. That would be bad.gab