Schoolfriends?

A woman was sitting in the waiting room for is first appointment with a new dentist. She noticed his dentistry degree on the wall, which bore his full name. Suddenly she remembered that a tall, handsome, dark-haired boy with the same name had been in same high school class some 30 odd years ago. Could he be the same guy that she had a secret crush on, way back then? Upon seeing him, however, she quickly discarded any such thought.
This balding gray-haired man with the deeply lined face was way too old to have been her classmate... or could he?
After he examined her teeth, she thought that really should at least ask if he had attended Ulladulla High School.
"Yes! Yes, I did!" he gleamed with pride.
"When did you graduate?" she asked.
He answered, "In 1969. Why do you ask?"
"You were in my class!" she exclaimed.
He looked at her closely. Then that old, wrinkled, baldheaded, fat, gray haired, decrepit son of a bitch asked
"What did you teach?"

Now, that is a class act.