Forehead wrinkles. Horizontal or vertical?
 

Here's a theory I'm considering:


people who have horizontal lines on their forehead are nicer than those that have vertical ones.

I'll buy it. Think of the face you make for each of those.

There are exceptions. Some nice people have bad vision and do a lot of squinting.... Some mean people have both kinds.

But, it's a quick tell.... It's one of the things I use to gauge how to approach customers.

And this: