Consultancy

A shepherd was herding his flocks in a remote pasture when suddenly a brand new Lexus SUV advanced out of a dust cloud towards him. The driver, a young man in a Brioni suit, Gucci shoes, Ray Ban sunglasses, and an YSL tie leaned out of the window and asked our shepherd,
"If I can tell you exactly how many sheep you have in your flock, will you give me one?"
The shepherd looks at the yuppie, then at his peacefully grazing flock, and calmly answers, "Sure!" The yuppie parks the car, whips out his notebook, connects it to a cell phone, surfs to a NASA page on the Internet where he calls up a GPS satellite navigation system, scans the area, opens up a database and some 60 Excel spreadsheets with complex formulas. Finally, he prints out a 150 page report on his hi-tech, miniaturized printer, turns round to our shepherd and says, "You have here exactly 1,586 sheep!"
"That is correct. As agreed, you can take one of the sheep," says the shepherd. He watches the young man make a selection and bundle it in his SUV.
Then he says, "If I can tell you exactly what your business is, will you give me my sheep back?"
"Okay, why not," answers the young man.
"You are a consultant," says the shepherd.
"That is correct," says the yuppie. "How did you guess that?"
"Easy," answers the shepherd. "You turn up here although nobody called you. You want to be paid for addressing a question I already knew the answer to. And you don't know anything about my business because you took my dog."