You gotta love him!

Teacher: If I gave you 2 cats and another 2 cats and another 2, how many will you have?
Johnny: Seven, Sir.

Teacher: No, listen carefully.
If I gave you 2 cats, and another 2 cats and another 2, how many will you have?
Johnny: Seven

Teacher: Let me put it to you differently.
If I gave you 2 apples, and another 2 apples and another 2, how many will you have?
Johnny: Six.

Teacher: Good. Now if I gave you 2 cats, and another 2 cats and another 2,
how many will you have?
Johnny: Seven!!!

A very angry Teacher: Where the in hell do you get seven from?!?!?
Very angry Johnny: Because I've already got a fu%%in cat at home!!!