Because bald guys get called "Curly"
Many years back, I set a little type from time to time. The shoulder on a cap is below the letter (to allow the tails of p's and q's to hang down) so an inverted N is immediately recognizable, and there is a nick at the bottom side of the letter too. But they snuck through anyway, because you could buy inverted fonts and they'd end up getting mixed. Great link, brought back memories, thanks.