...Pedro is walking home through the desert when he finds a little, brown jug. He pulls the cork and a genie pops out. "For releasing me from my prison, I will grant you one wish."
Pedro thinks for a while and decides: "I want to have a never ending supply of the best Tequila in all of Mexico."
"Granted," says the genie, "henceforth you will piss only the best tequila in all of Mexico."
Pedro is a bit confused by the way in which is request was answered, but he is game. He goes home, finds a glass, and takes a piss in it. He looks at it... it looks like tequila. He sniffs it... it smells like tequila. He takes a sip... Hot Damn! It is the finest tequila that he has ever tasted.
He gets down another glass, fills it up, and calls his wife into the room. "Here Carmen, drink." She drinks and her face lights up. "Where did you get this fantastic tequila, Pedro?" In answer, he whips out his cock and re-fills his glass, then tells her the entire story of the genie.
They live the high life for several days, but on Friday evening, Pedro fills only one glass with tequila and begins drinking. His wife is confused and a bit hurt. "Don't I get any tequila tonight?"
"Ah Carmen," he says, hefting his cock, "tonight, you drink from the bottle."