That's why I never bothered with class reunions.
As for the phrase "this is what 40 looks like", it's true that given a combination of luck, genetics, and serious dedication to fitness and diet, it's possible to look like those images of your 40-year-old friends. But I get seriously irritated by having "hot" 40-year-olds and "super seniors" trotted out by friends, spouses and the media as "inspirational" examples of how woman can look as we grow older. Most of us would recoil at the thought of holding up a picture of a supermodel as an "inspirational' image for a teenage girl, so why isn't there the same sense of outrage when these images are directed toward older women?
As you said, Mo, you have a pretty healthy sense of yourself and don't need others to reinforce that you can hold your own with your friends. The more interesting point is your observation that external comparisons can still exert a powerful hold on our sense of self, even though we've long left high school behind. Those feelings of not measuring up, and wanting to emulate others, obviously don't go away very easily.