I recently aged 44 and while I've never been one overly preoccupied with age, my chest hair turned gray.  First of all, unlike Geraldo, I spare you a selfie proving it. 
But there's a bigger philosophical if not medical question involved here - why does hair gray differently?
I grayed first in my head hair which jokingly I attributed to my first cross county walk.  My beard came next but now it's trickled its way down to my chest which I can only blame the PCH for. 
But it's only a few gray hairs which I hope means I still got game.  How and why does hair gray is my question today?
 
