I found my first gray when I was 23. Figured I earned it and was going to keep it.
When someone asked me if a photo of me when I was only a few years younger was my daughter! I figured that it was making me look old....and Miss Clairol and I became once a month best buddies.
Now I think "Heh! Why did I care what that guy thought?" and often think about letting it grow out...but then I never do...
Someday maybe...