Guy at a bar called to the barkeep: "Hey, Donkey! ... gimmee another beer!"
He was served, only to call again after 10 minutes "Hey, Donkey! ... gimmee another beer!"
Another customer said to the barkeep: "Rude bugger!... but why does he call you Donkey?"
The Barman replied: "I dunno, but he aw, he aww, he awww, he always calls me that!"