Without our caps where would we put all our 'stuff' when we get to our hotel rooms?
First thing off, cap, then into it goes wings, slides, wallet, ID card, earplugs, hanky, tie, loose change, room key, two for one drink coupon etc etc, I'd lose way too much of my 'stuff' if I didn't have my pilot's cap.
LOL .. now that's funny BH! I knew there was a good reason to have them!