Grandpa was celebrating his 100th birthday and everybody complimented him on how athletic and well-preserved he appeared. "Gentlemen, I will tell you the secret of my success," he cackled. "I have been in the open air day after day for some 75 years now."

The celebrants were impressed and asked how he managed to keep up his rigorous fitness regime.

"Well, you see my wife and I were married 75 years ago. On our wedding night, we made a solemn pledge. Whenever we had a fight, the one who was proved wrong would go outside and take a walk."

WHOOPS... I think I was mistaken on the true happiness found. What follows was the original story.

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 lady. "We visited the Grand Canyon and took a trip down to the bottom of the canyon by pack mule. We hadn't gone too far when my husband's mule stumbled. My husband quietly said 'That's once.' We proceeded a little farther when the mule stumbled again. Once more my husband quietly said, 'That's twice.' We hadn't gone a half-mile when the mule stumbled a third time. My husband promptly removed a revolver from his pocket and shot him.

I started to protest over his treatment of the mule when he looked at me and quietly said 'That's once.'"