I met my cousins who were born in 2007 and 2008 and were middle school students, and they said there were quite a few kids at school who had dual arms after just graduating from elementary school..;;
I don't know. To be honest, I thought that my school days would have been more enjoyable if I had spent my school days with pretty eyes, but I think it's definitely deformed to hear that kids who haven't even entered middle school have double hands.