In a small town in Texas a local cop was eating in one of his favorite diners. As he was drinking his coffee a old couple, mabye in their eighties, sat in the booth next to him. They were mad in love and talking about the town in the "good old days".

The old grandmother then said "Oh Mark, do you remember the first night we met up here and you brought me back behind this place to make love on the fence?"

"Of course I do," said Mark, "that was the best night of my life! What do you say we make our way over there so I can show you what I got?"

So the old couple got up and went out the back door. The cop, although disgusted, thought he better go have a look... just to make sure they were safe. He went behind a tree and saw the old man make love to his wife. They went on for almost a whole hour until they both fell to the floor twitching and steaming.

The cop quickly ran over to see how they were, and they were fine. The cop then asked the man, "Sorry, if this is awkward but how did you do it for that long, with that much energy? That was amazing, especially for your age!" The man, still recovering, replied "I'm not really sure what are secret is, but 40 years ago that was not an electric fence."