I am guessing it might have to do with sunlight
since that is when I moved to a large university
and had to walk 5 miles a day or ride a bike (no
car).  So most of my bangs are silver.  But, then
again, my grandfather had completely silver hair
by the age of 20.

I personally do nto really care.  Silver hair
doesn't show a sign of age.  I still get asked
whether or not I am over the age of 13 (I actually
DO look about 13, which can kinda get annoying
whenever you are going into a club or what-not).

Here is a cel of Yue from CCS!  Such a beautiful
white haired hunk!!  *Big Sigh*  :-)

Star Phoenix