A tourist walked into a pet shop and was looking at the animals on display. While he was there, an officer from the local RAF base came in and said to the shopkeeper, "I'll take one of those monkeys, please".
The shopkeeper nodded, went to a cage at the side of the store and took out a monkey. He put a collar and lead on the animal and handed it to the officer saying, "That'll be £2000, please."
The officer paid and left with the monkey.
The surprised tourist went up to the shopkeeper and said, "That was a very expensive monkey. Most of them are only a few hundred pounds. Why did that one cost so much?"
The shopkeeper answeread, "Ah, that's a special 'Technician' monkey; he can rig aircraft flight controls, pass the RAF fitness test, set up a perimeter defence and perform the duties of any Warrant Officer with no back talk or complaints; it's well worth the money."
The tourist then spotted another monkey in another cage. "That's even more expensive! £10000!! What does it do?", he asked.
"Oh, that one", replied the shopkeeper. "That's an 'Engineer Officer' monkey. He can instruct at all levels of maintenance, supervise maintenance at Unit, intermediate and Depot level and even does all the paperwork. A very useful monkey indeed."
The tourist looked around a little longer and found a third monkey in a cage. This time the price tag was £50000. The shocked tourist exclaimed, "This one costs more than the other two combined! What in the world can it do?"
"Actually," said the shopkeeper,"I've never really seen him do anything but drink beer, play with his dick and wind-up the other monkeys, but his papers say he's a Pilot."