[roguecoder]

Blond hair is less common in the US than autism, but it would be considered very strange to call brown-haired people "normal" and blond-haired people "abnormal".

[dragonwriter]

> Blond hair is less common in the US than autism

The stats I can find quickly suggest blond hair in the US is around 3%, and autism in the US is around 1.7%.