And no moustache for the man in the mirror

The story:

I was singing along to the tv, while in the kitchen. My boyfriend thought it sounded really funny that someone would say "no moustache for the man in the mirror", and he couldn't stop laughing about it all night. "Isn't that a song about sending out a message?" He said. He made me submit it to this site straight away. I always wondered why MJ would say such a thing...