Teacher: "If I gave you 2 cats and another 2 cats and another 2, how many would you have?"
Johnny: Seven!
Teacher: No, listen carefully... If I gave you 2 cats and another 2 cats and another 2, how many would you have?
Johnny: Seven!
Teacher: Let me put it differently. If I gave you 2 apples and another 2 apples and another 2, how many would you have?
Johnny: Six!
Teacher: Good! Now, if I gave you 2 cats and another 2 cats and another 2, how many would you have?
Johnny: Seven!
Teacher: Johnny, where in the heck do you get seven from?!
Johnny: Because I've already got a freaking cat!
