I'm not kidding.
I have a natural distrust for people who have a moustache with no other facial hair.
It's noone's fault. The moustache people never did anything to hurt me. They just look…shifty.
Here. Look at this guy:
Would you let this guy waltz with your daughter? He's probably contemplating how he can blow up Montana right now. You don't have to like Montana to know that's wrong.
I know what you're thinking—this isn't fair. He's making a serious face. Everyone thinks that serious faces are nasty. I'm sure if you caught him in the middle of the day when the sun is out and the bees are happy, he would look a lot less intimidating. I might even let my daughter waltz with him. I bet he loves Montana and vacations there as often as he can (within reason).
How about now?
He looks worse, doesn't he? Kinda looks like he just finished eating your pet bird. I don't know about you, but I find that pretty disturbing. You can take Montana, but my pet bird? That's just nasty.
But now you're thinking that all grown-up people must look a little serious, and that all of them can be a little (or a lot) intimidating.
No. To all three points. Here he is when he was just a kid:
Smiling. Young. Creepy.