A blonde bought two horses and could never remember which was which.
A neighbor suggested that she cut off the tail of one horse, which worked great until the other horse got his tail caught in a bush. The second horse’s tail tore in the same place, and the blonde was no longer able to tell the two horses apart.
She returned to her neighbor, who then suggested that she notch the ear of one horse, which worked fine until the other horse caught his ear on a barbed wire fence.
Once again, the blonde couldn’t tell the two horses apart and went back to her neighbor for advice. The neighbor suggested that she measure the horses for height.
When she did that, the blonde was very pleased to find that the white horse was 2 inches taller than the black one.