Fred and his brother, "Donkey" walk into a pub and Fred gets the first pint in and says, "I'll have a pint for me and a pint for Donkey." The two guys drink their pints and Fred says, "Right donkey your round; I'll have a pint of Guiness."
Donkey walks up to the bar and says, "2 p p p p pints of g g g g Guiness p p p please."
While donkey gets the pints, Fred goes to the toilet and the barman says, "Say, you shouldn't let him call you that stupid nickname."
Donkey replies, "I know. He aw.. he aww... he awwwwww, he always calls me 'Donkey.'"