Tell the Difference
A blonde bought two horse 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 looked exactly like the
other horse's tail. Our blonde friend was stuck again.
The neighbor 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, our blonde friend couldn't tell the two horses
apart.
The neighbor then 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.