Was deportment not what they made you balance books on your head for? I've always kept out of the way in case they lost control and dropped the books on my foot.
That is what models do to train themselves to GLIDE across the floor. Or at least that is a typical depiction..stereotypical. Were you or are you a model? Are you a good glider book balancer? Now of course you need a flat head to pull it off. Pointy headed folks can't do it. I don't know if I answered your question. I did take modeling when I was younger but never did the book balancing thingy. Did a lot of exercises to firm up. But as far as books are concerned I only ever read them and never head-carried them. What about you? Thank you for your reply Malizz and Happy Saturday to thy! :)