When I was 6 I was an exceptional child. I didn't get along well with other children, so i chose to hang out with adults. I learned somehow how to guess other people's ages and I was astonishingly good at it (I can't do this now!)
As a matter of fact, i really annoyed some people by correctly telling their age in social gatherings.
I remember this one woman, her name is gone into the mists of time. She was a single woman with a boston terrier. I sat next to her and looked at her greying hair and her wattles (neck skin) and her funny fingers... she was 52 years old (I'm 57 now) to me she was very old. She did not like children and especially smart aleck children who guess her age. Of course I knew people who were older than her back then too, but noteworthy is the fact that at the age of 6 I was certain that 50 was over the hill.
I have strived to not be that puffy unhappy woman.