Not all of them! I remember the amusement of my family when the snarky little girl-princess from across the street came over to our house with a friend, rang the doorbell, and when my teenaged California surfer brother with white-blond hair answered, she said half-accusingly, half-triumphantly to her friend: "See! He bleaches his hair!"
Guess he'd been doing it every summer since he was two years old! {^)
LOL. Some of the poor boys’ hair turned orange.