A couple was celebrating their golden wedding anniversary. Their domestic tranquility had long been the talk of the town. "What a peaceful & loving couple", everybody would often say. A local newspaper reporter was inquiring as to the secret of their long and happy marriage. "Well, it dates back to our honeymoon," explained the man. "We visited the Grand Canyon and took a trip down to the bottom of the canyon by horse. We hadn't gone too far when my wife's horse stumbled. My wife quietly said, "That's once." We proceeded a little further and the horse stumbled again. Once more my wife quietly said, "That's twice." We hadn't gone a half-mile when the horse stumbled the third time. My wife quietly removed a revolver from her purse and shot the horse dead." "I started an angry protest over her treatment of the horse, when she looked at me, and quietly said, "That's once." "And we lived happily ever after."