Why?

I'm going to begin with an apology to anyone that I offend, but this needs out.

What the hell is up with people wearing stocking caps and flannel when it's 90 degrees outside? I honestly cannot wrap my head around it. I've seen these people without hats on, they don't have bad hair, or some flesh eating scalp disease. So, there's NO reason for this.

If you are one of these people, please explain. I'm just curious.