The teacher in an elementary school gave his class as homework a project to tell their fellow students about an exciting or unusual event that happened the previous week.
The faithful day came and the teacher began the class by telling each pupil to relate their earth-shattering experience of the prior week.
However he knew that when it was little Johnny’s turn to tell his tale to expect something naughty.
The faithful time finally arrived.
Little Johnny sauntered to the front of the class, made a small white dot on the blackboard and went back his seat.
Nobody could understand what could be so monumental about his white dot on the blackboard, so the teacher finally asked little Johnny what was the meaning of his answer.
Johnny said it was a period.
“Everyone could tell that,” the instructor said, “but what is so interesting about a period?”
“I don’t know,” he replied, “but last week my sister said she missed hers.”
“After that my dad had a heart attack, mom fainted and our neighborhood delivery man shot himself.”