Because there are people in the world who have a thing about having their physical head covered, and these people are from a variety of backgrounds, there must be something to it. Does this sound like a weak argument for keeping my head covered? Possibly, but to the unspiritual, even the concept of God sounds weak.
I do not think that covering the head is something that is specifically Christian, Muslim or Jewish, but is an international phenomenon, as I have found by reading various articles and websites regarding hats, turbans and headcoverings for cancer patients.
Look for articles, links to websites and illustrations. I might also put in my own 2 cents from time to time.