A little boy is sitting at the kitchen table doing his math homework.
He says, "2+2, that son of a bitch is 4"
"1+7, that son of a bitch is 8"
Just as his mom walks in, he says, "3+4, that son of a bitch is 7"
"What are you doing?" she exclaimed!
"I'm doing my math homework!" the little boy replied
"Is that the way your teacher taught you how to do it?" asked the mother
"Yes" replied the little boy
The next day, the mother went to the teacher and said "What have you been teaching the children in math?"
"Well," began the teacher, "addition for most of last week and this week."
"And have you been teaching them to say stuff like 2+2, that son of a bitch is 4?" said the irritated mother
After laughing, the teacher finally replied, "I taught them by saying
2+2, the sum of which is 4!"