It is about those who use their left hands or their left feet. I see that some left-handers can be very talented and smart. Some people are both righties and lefties at the same time. Those who use their left hands or feet have more force in using them. For instance, shooting a ball. The percentage of the lefties is not that big compared to the dominant one of the righties. I wonder if anyone can give more light to this discussion. Thanks for your participation.