Smile like you freakin' mean it
I don't smile because I think it's ugly, but I guess not because I hate the smile itself. I don't like the way it makes my face look when I smile, so that's why I refuse to do it. I don't think I can smile because of my nose and cheeks, but mostly nose. The only smile I'll ever do is a weird sunken in cheek smile, or a teeth gritted one, which probably looks even stupider anyways.