Oh geeze, 68 and only a few grays... I have a friend like you, she doesn't have to color either.
You just have no idea then what it feels like to take your child to kindergarden and have someone ask, "oh, are you Matt's grandma?" Or try to register them someplace and have the sweet young thing behind the desk tell you, "I'm sorry, we have to have a parent register them."
I am being funny here.. not mean... These things happened to me before I started being serious about coloring! So I'm with you, may not be Clairol, but I color.