I have a theory that after 45 you start counting back, after all by the time you'd be 90 your likely to be an oversized infant again
So that makes me 26
I look at people 10 years younger than me and think... god ... I don't look that old!
Then I realise I'm obviously deluded and my spectacles and mirrors are a few spectrum shades above rose coloured - I might get away with 60 though