Ok I think I've got the gist of this thread now or at least how everyone is thinking......
Two guys are in a small boat at sea after being shipwrecked. After a few days they are getting a bit thirsty so one of the guys goes looking through the survival gear when he chances upon a small brass lamp. Remembering stories of genies and rubbing etc., he rubs the lamp and bam! a genie appears.
"You have a single wish" intones the genie.
Quick as a flash one of the guys says "I wish the whole ocean was beer"
Suddenly the whole ocean turns into beer and the genie disappears along with the lamp.
The first guy turns to the other with a big grin on his face but his shipmate looks none too pleased. "What's wrong?"
"Nice going mate, now we're going to have to **** in the boat!"