Born before 85 years, especially in rural areas, more, why?
1. The rural economic conditions are not enough, and children don't need diapers. They usually use cloth, which is thick and has a cushion under it. After a long time, it will affect children's feet, especially men. My aunt told me this when I was mending shoes in college. It makes sense to think about it.
2. The external figure of eight is more conducive to the balance of the human body when standing than the internal figure of eight.