Found this one on the internet. It’s a good lesson on perspective.
“While waiting for my first appointment in the reception room of a new dentist, I noticed his certificate, which bore his full name.
Suddenly, I remembered that a tall, handsome boy with the same name had been in my high school class some 40 years ago.
Upon seeing him, however, I quickly discarded any such thought. This balding, gray-haired man with the deeply lined face was too old to have been my classmate.
After he had examined my teeth, I asked him if he had attended the local high school.
‘Yes,’ he replied.
‘When did you graduate?’ I asked.
He answered, ‘In 1944.’
‘Why, you were in my class!’ I exclaimed.
He looked at me closely and then asked, ‘What did you teach?’”
(S - PAULandBARB76@webtv.net (Paul Edward Paulsen))