Lake of beer

There were two guys fishing in a boat. And they haven’t caught anything all day. Suddenly the one pulls up a old lamp and wipes it off. Out comes a genie. The genie says ” I will give you one wish what will it be?” So the guy says turn the whole lake into beer. Poof the lake is beer. The guy turns to the other and says so what do you think of that, the other guy says “I think your a fucking asshole, now we have to piss in the boat.