Why do children need to get their ears pierced when counting eight characters?

Ear piercing is for disfigurement, which means that children are easily disfigured into figure eight, so it is too early to disfigure at an early age. There is also the fact that children always cry when they are young, and they are disobedient and difficult to educate, so they have their ears pierced to make him obedient. These are folk sayings, and different people have different opinions.