I went to a school reunion last year, arranged for when we reached our 70s. When you see how old all your friends look, many of whom I hadn't seen for years, it brings it home to you how others see you.
I still have a photograph of ten friends in the sixth form when we decided one day after school to go to the local photographer. Two rows of five boys, every one of the five seated in the front row is dead.
On the positive side it was a good night, with all those I was friendly with in school having the same sense of humour as they did as teenagers in the 1960s. We have all aged more on the outside, than in our attitudes to life.