The kindergarten class had a homework assignment to find out about something exciting and relate it to the class the next day. When the time came for the little kids to give their reports, the teacher was calling on them one at a time. She was reluctant to call upon Little Johnny, knowing that he sometimes could be a bit crude. But eventually his turn came.
Little Johnny walked up to the front of the class, and with a piece of chalk, made a small white dot on the blackboard, then sat back down. Well the teacher couldn't figure out what Johnny had in mind for his report on something exciting, so she asked him just what that was.
"It's a period" reported Johnny.
"Well I can see that" she said. "but what is so exciting about a period."
"Damned if I know" said Johnny, "but this morning my sister said she missed one. Then Daddy had a heart attack, Mommy fainted and the man next door shot himself."
Little Johnny was busy doing his homework. As his mother approached she heard him say:
"One and one, the son-of-a-bitch is two." "Two and two, the son-of-a-bitch is four." "Three and three"
His mother interrupted, asking where he had learned this way of doing math. Little Johnny remarked that his teacher Ms. Margo taught him. His mother was rather upset and told him to stop the homework.
The next day she stormed into Little Johnny's classroom and confronted Ms. Margo. She told her about Little Johnny's different way of doing math, and his claims that Ms. Margo taught it that way to the class.
The teacher was flabbergasted. She said that she couldn't understand why Little Johnny had said that. Then suddenly, Ms Margo exclaimed, "Oh, I know, here in school we say: one and one, the sum-of-which is two!"