Dear WO'N: Even the ombibulist has to be on his guard. Take the case of the guy who pounded on the door of a tavern hours after it had closed, until owner opened upstairs window. The guy below demanded a quart of half-and-half. A brief delay, and the owner opened the door and handed out a pitcher. The drunk took a draft and screamed "That's piss!" "Right," said the owner. "Half mine and half my wife's."