Because it's always black and white.
Because they have no pits.
You see, firetrucks have 4 wheels, can carry 8 men and 4+ 8 = 12. There are 12 inches in a ruler and Queen Elizabeth was a ruler. There was once a ship named Elizabeth that sailed the seas. Fish live in the seas and fish have fins. People from Finland are called Fins. Finland and Russia had a war a long time ago. Russia has red on its flag and that's why they're red. Cause they're always russian around.
Seven. It *has* to be seven.
OCD, OCD, OCD. Wait the last time didn't feel right. OCD, OCD, OCD. Wait, the second time didn't feel right. OCD, OCD, OCD. Wait...