It's amazing what an expression and pose can do to creep people out, like teeth on a smiling teddy bear stuffed toy. Either way I must wonder if this would make slender man more scary if he appeared with a facial expression like this?
Oh man, I really don't know. Part of what makes him so scary is that he has no face, right? Interesting idea though. Cute things definitely also look scarier with teeth. I love the teeth, haha~ Thank you for great comment