A police officer pulls you over and tells you to "just be careful" when you're driving at night. AND, rather than being offended, you think "What a nice young man!"
The idea of bootcamp, running, or any other high-impact workout makes you think "Oy, my back!"
The assistant in a class you are teaching was born in 1996 (!!!!!)
You are no longer the young, cool, totally-relate-able-in-her-20's teacher. You are now the same age as the kids' PARENTS!
Your own kids are no longer toddlers.
You find yourself choosing sleep over sex more often. (!!!!!!!)
You stop caring so much about what others think of you.
You're tolerance level for bullcrap goes WAAAAAY down.
Mall walking doesn't seem like a bad way to work out!
Golf gets more appealing. Wait, OK, even I'm not there yet! (And never will be, thanks to my complete and utter lack of hand-eye coordination!)
You find yourself relating to you 12 year-old, arthritic dog.
You realize you wish you'd knwn in your 20's what you kow now, and saved yourself a lot of time and angst.
You also realize that what you used to believe was "old, " isn't.
You think about a 3rd (or 4th or 5th, etc.) career.
You begin to appreciate senior citizens more. The things they have seen!
You catch yourself thinking (or saying) "When I was your age..."
You start to appreciate your body more. Maybe realizing that you don't HAVE to look the same at 41 as you did at 21! (Unless you are in Hollywood or one of the Real Housewives. But they are nuts. And you're thankful you are not one of them.)
You realize that 41 is actually NOT old at all! And that you are happier now than you ever were before, and wouldn't go back your 20's or even 30's for anything!