teacher and akpos

Teacher: If I give you 2 cats and another 2 cats and another 2 cats, how many cats will you have? Akpos: Seven, Sir. Teacher: No, listen carefully. If I gave you 2 cats, and another 2 cats and another 2 cats, how many will you have? Akpos: Seven. Teacher: Let me put it to you differently. If I give you 2 apples, and another 2 apples and another 2 apples, how many will you have? Akpos: Six. Teacher: Good. Now if I gave you 2 cats, and another 2 cats and another 2 cats, how many cats will you have? Akpos: Seven!!! Teacher (angry): Where did you get your seven from? Akpos: (Angrilly!) Because I already have 1 cat at Home!