I used to think that age equated to percentage of life lived, thus I thought that most people live to close around 100.
But it also made me think that people only get old when they’re like 80.
I mean like actually “old”. The “old” adults were referring to. At that age I considered those 14/15 year old 9th graders old, just a bit different “old”.
“Old” was always x number of years older than me. So at 8, my 13 year old sister was old. The limit has widened to now I see us as effectively at the same phase in life and “old” is now my relatives who are a life phase or two ahead of me, planning retirements or having grandchildren.