an elderly couple is having an anniversary dinner when the jusband asks his wife, "do you remember the first time we had sex together, 50 years ago? we went befind this tavern, you leaned against the fence and i made love to you."
"yes," she says. "i remember it well."
"why dont we do it again for old times sake?" he asks, and the wife agrees.
a bemused police officer overhears them and decides to keep an eye on the pair to make sure there is no trouble. behind the tavern, he observes the couple drop their drawers. the wife grabs the fence and suddenly the two begin having the most furious, athletic sex the cop has ever seen. it lasts for a full hour. finally, the old folks collapse, panting.
amazed, the cop approaches them. "that was something else!" he says. "how do you muster such energy at your age?"
the old man replies, "fifty years ago that wasnt an electric fence."