Little Johnnys teacher told the class to go home and find something interesting to tell the class for the next day. The next day when the teacher told Johnny to tell his story, he went up to the blackboard and drew a period. The teacher asked Johnny what was so interesting about a period. Johnny stood up and replied I dont know, but this morning when my sister said she missed one, mom fainted, dad fell down the stairs, and the guy next door shot himself!