I had a group of 7th-graders who didn't know my age (either they were relatively new students who hadn't been through an "introduction" class with me, or else they'd completely forgotten).
I had them attempt to estimate my age. I do this when they ask how old I am, unless I make a joke and say something outlandish, like "I'm 647." Kids are notoriously unreliable in estimating my age, but I nevertheless feel discouraged that the average age estimate was almost 10 years too old: 55. Normally the average, at least, comes out not that far off, despite some outlying individual estimates.
Am I looking old, lately? Acting old? Is my ennui showing?
Sigh. Again.