Having finally left corporate America to pursue my dream of writing, I’ve quit wearing makeup and coloring my shoulder-length hair. I’m in my early 50s and the gray is mostly in the front, so it almost looks as if it were colored that way. Or so I thought. I’ve now been asked three times at the grocery store if I’d like to use my senior citizen discount. The first time I was so stunned I couldn’t talk. The last time I almost whacked her with my asparagus. How do I handle this if it happens again?