A plane crashes in the Sahara. The only survivors are two subeditors. They wait and wait under the beating sun but no help comes.
“We must start walking,” cries the first sub. “Any direction will do.”
For four days they march. Their skin burns and their bodies dehydrate until finally they collapse at the foot of a sand dune.
“I will lie here and die,” says the first sub.
“No,” says the second sub. “Let us climb to the top and see if there is hope.”
So up the dune they stagger and from the top they see the most beautiful azure oasis. They roll down the other side of the dune and the oasis is not a mirage.
The first sub plunges his hands into the pure water of life, the most perfect sight he has ever seen, and looks up to see the second sub opening his fly and pissing in it.
“What the fuck do you think you are doing?” cries the first sub.
Surprised and faintly affronted, the second sub replies:
“I’m making it better.”