There was a time when facial hair was the only accepted public facade for men.
Some guys think that they slim the face--you see them a lot on chubbies. And a lush moustache can help the look of someone with a big beak. But--in general, I don't like face-hair. So many guys just scratch and piddle with it. Makes the onlooker feel itchy.
Uh.... We're talking about mustaches. Right?
"Some guys think that they slim the face--you see them a lot on chubbies."
Yes, that's true, you do. And they don't look all that bad, but you just have to *think* about them too much, and I very much dislike vanity in men. I can tolerate it in women much better.
I still remember the first t-shirt with words on it I ever saw, and it was very clever. It had "ytinav" printed on it, so you'd see it correctly when you looked in the mirror.