A salesman walking along the beach found a bottle. When he rubbed it, lo and behold, a genie appeared.
“I will grant you three wishes,” announced the genie. “But since Satan still hates me, for every wish you make, your rival gets the wish as well — only double.”
The salesman thought about this for a while. “For my first wish, I would like ten million dollars,” he announced.
Instantly the genie gave him a Swiss bank account number and assured the man that $10,000,000 had been deposited. “But your rival has just received $20,000,000,” the genie said.
“I’ve always wanted a Ferrari,” the salesman said.
Instantly a Ferrari appeared. “But your rival has just received two Ferraris,” the genie said. “And what is your last wish?”
“Well,” said the salesman, “I’ve always wanted to donate a kidney for transplant.”