Two origin theories that spring to mind are... A) People of African/Melanesian/Aborigine heritage can have hair that is near impossible to wear a helmet with

Two origin theories that spring to mind are... A) People of African/Melanesian/Aborigine heritage can have hair that is near impossible to wear a helmet with B) Sikhs. I know in my country that they're exempt from motorcycle helmet laws provided they don't exceed 50km/h.