When my mother was a child, any child who was displayed left-handed traits was considered possessed and had their left hands restrained.
My mother started school a little over 100 years ago, and was left handed. As was normal in those days, the teachers tried to break that "habit" and make her right handed like the rest of the class. When her mother heard that, she went to the school and told them that if they didn't cease and desist that barbaric practice RIGHT NOW she'd take Mom out of school and teach her at home, with the result that she was the only left handed student in her class. As the desks in those days had only a small writing surface on the right side, she had to learn how to write in a rather unusual way, but learn she did, with a very clear hand. I've heard that a similar "education" is part of what caused George VI's speech issues, but that's just speculation.