A saucy video showing a boss romping with his secretary in front of a blind employee has become a hit on YouTube, a report says.

According to orange news, the clip shows a boss praising the blind clerk for his work while he silently strips off for a sex session with his personal assistant in the computer print room.

And when the worker finally leaves the room, the pair fall to the floor, their groans of passion drowned out by the noise of the printers.

The ad - produced by the Norwegian Association for the Blind - closes with the line: “Avoid gossip at work, hire a blind person.”

“It's a funny advert but the point is to make people think positively about blind employees,” a charity spokesman was quoted as saying.

“The blind man in the advert knows his job inside out and you're never quite sure if he knows what's really happening or if he's just being discreet.”