Anuran, a variation on your joke:
A man finds a grimy jar on the street, and rubs it with his sleeve. A genie pops out of the bottle and exclaims, “Thank you for releasing me! I will now grant you three wishes for anything you desire!”
“Anything?” the mans asks.
“Anything,” the genie responds, “But you should know that whatever you wish for and receive, your shvigger will get twice as much.”
The man rubs his chin and thinks. “I want a million dollars.”
Poof! A briefcase with one million dollars appears at his feet. At the same time, his cell-phone rings. On the other end of the line is his wife, who breathlessly exlaims, “Yankie, Ima just won a two million dollar raffle!”
The man wrinkles his nose and thinks again, determined to outsmart both the genie and his burdensome mother-in-law. Suddenly he smiles and says, “I would like a new Buick.”
Bling! A shiny new Park Avenue appears at the curb. Momentarily, his phone rings again. “Yankie, Ima just inhereted Uncle Abie’s brand new Cadillac!”
Now the man is peturbed. He thinks, and thinks, and thinks – quantitatively and qualitatively, his shvigger has beaten him twice. Suddenly an evil glint appears in his eye. He turns slowly toward the genie and asks, “So, I’ve got one more left?”
The genie says, “Yes.”
“And whatever I wish for, my mother-in-law gets twice as much?”
The genie says, “Yes.”
“Well, in that case,” says the man, “I would like you to frighten me half-to-death.”