Mama, why are you growing white hair?

Well, I said that I didn't mind growing older. That is, until my lovely, charming, swell 7 year old asked "mama, why are you growing white hair?" Crap. I've been found out. Darn kid. Apparently I need a haircut BADLY because the whites (yes, I went right to white and skipped gray completely, but I was hoping to hide that truth) show when I have to put in a headband. Sigh.