Testing For Rabbits

The teacher was asking Harold some math questions.

Teacher: If I give you two Rabbits, and two rabbits, and another two rabbits, how many rabbits do you have?
Harold: SEVEN!

Teacher: Let’s try this another way. If I give you two bottles of pop, and two bottles of pop, and another two bottles of pop, how many bottles of pop do you have?
Harold: SIX!

Teacher: Good! Now, if I give you two Rabbits, and two rabbits, and another two rabbits, how many rabbits do you have?
Harold: SEVEN!

Teacher: How on earth do you work out that three lots of two rabbits is seven?
Harold: I’ve already got one rabbit at home.