>>512305725
Before toilet paper, everyone wiped their ass with their left hand. The right hand was reserved for eating, and doing business in public. Shaking hands, waving to greet someone, and all commerce was done with the right hand.
You did not put your left hand anywhere near food, or other people. Even exposing your left hand in public was highly offensive.
Knights would lift their visor with the right hand, and this evolved into the modern military salute.
Criminals would have their right hand cut off, so society would know that they were leftists.
