Scenario 2: Your parent/sibling/child decides to take it upon themselves to tell you that your gray hair is no good, it makes you look older, and they don’t like it.
There are a few good advice-column-tested ways to handle this.
The Miss Manners Approach #1: “How Kind of You To Take an Interest in my personal business!”
I The Miss Manners Approach #2: Look at the person quizzically and say, “Excuse me, do I know you?”The Carolyn Hax Approach: “Wow” – and then turn away and refuse to engage