Ways to make you age - well they're countless really, though here's one I hadn't come across before. A 19 -year-old told me he'd met another old guy like me the other day. Quite interesting he said, as if he'd just discovered another species. To him we probably are.
How to explain that as a youth, as we walked, yes walked home from a date under dim streetlighting, we had the glory of stars and the Milky Way to look at. Another endangered species now that powerful artificial lighting is so ubiquitous?
Being an old guy has its advantages.