Two cowboy friends, Wally and Dallas, each bought a horse one summer. They enjoyed riding around and doing the things that cowboys do. When winter came, however, they did not want to pay to have their horses stabled for the winter. Instead, they decided to release them in a pasture and get them in the spring.
Wally noticed a problem however, and he asked Dallas, "How will we know which horse is which when we pick them up?"