There's a pensioner couple on holiday back to the place where they first met. So they're sitting in the pub and he says to her, “remember our first time together about forty years ago. We went round the corner to the gas works. You leaned against the fence and I gave you one from behind”. “Yes”, she says, “I remember it well”. “OK”, he says, “how about taking a stroll round there and I'll give you one for old times sake”. “Sounds like a good idea”, she answers.

So there's a chap sitting at the next table listening to all this having a chuckle to himself, and he thinks, I've got to see this, two pensioners having sex against the gas works fence. So he follows them. They get to the gas works, she lifts her skirt, takes her panties down and leans against the fence. He takes her from behind and goes hell for leather like an eighteen year old. The other chap is peeping round the corner at this thinking, fuck sake he can't half go for a pensioner.

After about forty minutes the old couple finish and get there clothes back on. The guy watching thinks, that was fucking amazing, he was going like a train. I've got to ask him what his secret is. As the couple pass the chap says, “That was something else, you must have been shagging for about forty minutes. How do you manage it, is there some sort of secret”.

“No there's no secret”, the man says, “but forty years ago that fence wasn't electrified”.