Subject: Simple maths?

Makes sense to me!

2+2+2=7

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

Johnny: Seven

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 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!!!

A very angry Teacher: Where in the hell do you get seven from ?!?!?

A very angry Johnny: Because,.... I've already got a f***ing cat