A tourist walking through a market square in Cairo one afternoon asks for the time from an old man standing next to a camel. The old man grabs the camels balls lifts them up and says "its just gone 3.30pm". The tourist is very impressed, he goes back to his hotel and tells a fellow guest that he met an old man who can tell the time by the weight of his camels bollox, the next day, both of them go to the man and ask him the time, the old man lifts the camels knackers and say's "it's 11.30am", the two tourists go back to the hotel and tell a third man of their discovery, the next day all three go to the old man and ask him the time and again the old man obliges by lifting the camels nads. "excuse me" says the first tourist, "thats such a great trick, do you think you could teach me how to do it?", "certainly" says the old man, "first, you must grasp the testicles of the camel, then you must raise them to the belly of the camel, then you must part the two testicles with your thumbs" the tourist does exactly as the old man says, "and now, if you look under the camel" says the old man, "you will see that you have a clear view of the big clock in the tobacconists window over there!"