A couple was celebrating their golden wedding anniversary. Their
domestic tranquility had long been the talk of the town. 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 the bottom of the
canyon by pack mule."
"We hadn't gone too far when my wife's mule stumbled. My wife
quietly said, 'That's once.' We proceeded a little farther when the
mule stumbled again. One more my wife quietly said, 'That's twice.'
We hadn't gone a half-mile when the mule stumbled a third time. My
wife promptly removed a revolver from her pocket and shot
him."
"I started to protest over her treatment of the mule when she
looked at me and quietly said, 'That's once.'"