I spend a lot of time in unfamiliar environments as I travel, and now and then, this results in banging my head against something, followed by, "I can't believe

I spend a lot of time in unfamiliar environments as I travel, and now and then, this results in banging my head against something, followed by, "I can't believe I did that again, I've got to be more careful." Recently, when it was cold, while I was wearing a couple of hats and a couple of hoods, I happened to bang my head into an object above me, something which happens to me infrequently, but regularly. Because of all the padding, I felt the impact, but it did not hurt me nearly as much as it normally would have. Since then, I've been wearing one or two thick hats most of the time, and this habit has already saved me from that very unpleasant experience of hitting my head on a sharp corner. People ask me if I'm warm, but I barely notice it. I think that, as also with sleeping in a thick blanket, my body adjusts and just produces less heat.