The archaeologist
Fellas in Cairo and he wants to hire a camel to take him deep into the desert to look for a lost city.
He goes to the local camel hirer and selects a good one, the arab asks how long he's gonna be away and the fella says about a week, the arab tells him to make sure the camel has a good drink before he sets out and told him to brick the camel also.
He sets out and he's gone for 5 days when suddenly the camel drops dead, he's completely lost and near to death when a group of wandering arabs spot him and give him water.
They asked him what happened and he tells them the camel collapsed, they asked him if he'd given the camel water before he left and he nodded, they also asked him if he'd bricked the camel and he was puzzled by the question and asked what they meant.
The said that when the camel drinks from the trough you go round the back of it and use a brick in each hand and smack the camels testes, that way it makes the camel take on another 20 gallons.
He asked if that wasn't sore they said no as long as you don't trap your thumbs between the bricks.