Once upon a time there was a shepherd looking after his sheep on the side of a deserted road in the Highlands. Suddenly a brand new bright red Porsche 911 appears and screeches to a halt beside him. The driver, a woman wearing a Chanel suit, RayBans and a Cartier watch, steps out and asks the shepherd, "If I can guess how many sheep you have, can I keep one?"
The shepherd looks at the large flock and says "OK". The woman connects a laptop to a mobile phone fax, enters the NASA website, scans the field using GPS, opens a database linked to 60 Excel files with logarithms and pivot tables, then prints out a 150 page report on a high tech mini printer.
She studies the report and says to the shepherd, "You have exactly 1586 sheep." The shepherd replies, "That's correct. You can have the pick of my flock." The woman packs away her equipment, looks at the flock, and puts an animal in the boot of her car.
As she is about to leave, the shepherd says, "If I can guess your profession, will you return the animal to me?"
The woman thinks for a moment, and then agrees.
The shepherd says "You're an NHS manager, aren't you?"
"Correct" responds the woman, "but how did you know?"
The shepherd replies "Simple. First you came without being invited. Second, you wasted a lot of time telling me what I already knew. Third, you don't understand anything about the work I do, but interfere anyway - now can I have my dog back?"