Around age 40, I noticed a shift in the way younger people in their 20s viewed me as a night supervisor. No one ever said it to me, but I sensed there were times when younger people were on the verge of saying, "Hi, old person," or "How are you, old person who is old?" For all I know, they might have thought, "Drew sure is grouchy today. He must be in chronic pain. I've heard that's common among old people."
I can't know that for sure, but I have a hunch.