I imagine when you were in kindergarten and after nap you tried to put your left shoe on first the teacher beat your left foot with a ruler. I started school in the 1950s and my mom tells me that I complained to her when the teacher tried to make me write right-handed. She ordered the school to stop (her school successfully turned her into a right hand writer although she was left handed). So, I proudly wear the left hander's tattoo (permanently ink smudge on the side of my left hand) to show my victory over the system! As for the shoes thing, I'm actually ambidextrous when it comes to using hand tools so that's why I mix and match the order I put my shoes on. But typically it's left shoe first.