Two guys in a life raft in the middle of the ocean.
One sees an old bottle floating. He picks it up and rubs it, and a genie comes out.
The genie says, "For letting me out, I will grant you one wish."
The guy says, (without thinking) "Turn this ocean into beer". And the ocean turns into the best beer anybody has ever tasted.
The second guy says to the first, "You idiot, now we'll have to piss in the boat".