I have frequent severe tension headaches, and somehow a hat seems to relieve them a little sometimes. Maybe from having some slight pressure on the veins. But the main reason I wear hats is because I have double cowlicks and hair trouble in general, ha. I used to grow my hair out in... unconventional ways and dye it, but now it doesn't grow out well and dyeing it is just too much trouble to deal with, so I like to just cover it up. This time of year I often wear my fedora, and in cool or cold weather I like to wear a beanie.