A teacher said to Johnny,
"If I give you two cats and then two more cats and another two cats how many cats do you have?"
Johnny. "seven sir"
Teacher. "No listen again.I give you two cats plus two cats and another two cats.How many cats are there?"
Johnny. " seven sir"
Teacher. "Lets do this another way. If I give you two apples then two more apples and another two apples how many apples do you have ?"
Johnny."six sir"
Teacher. "Great. So if I give you two cats and two cats and another two cats how many damn cats do you have?"
Johnny." seven sir".
Teacher. "Oh for God's sake.How the hell do you keep arriving at seven cats?" asked the teacher angrily.
Johnny replies angrily," Because I already have an effing cat sir!!!"