A Zebra on an exchange visit to an English farm, wanders around introducing himself to all the inhabitants.
He spies a sheep, trots over and says, "what are you??"
"I'm a sheep"
"And what do you do?"
"Well, I eat grass all day, every so often I'm taken to the shed, my wool is cut off to make clothes, and when I die my meat will be used to feed people and my fleece will make rugs and more clothes".
"Very good"; the Zebra trots off until he meets a horse; "What are you and what do you do?"
"I'm a horse; I'm fed and groomed; I give visiting children rides, sometimes pull about heavy machinery and when I die my hide will be used to make leather for shoes".
The Zebra trots off and eventually comes across a chicken; "What on earth are you and what could you possibly do?".
"I'm a chicken; I lay eggs for breakfast, and when I die my meat will be used to feed people".
Next, a cow, "I'm a cow, I graze all day, I give buckets and buckets of milk and when I die I'll be used to feed and clothe people - I'm probably the most useful animal on the farm".
Finally, the Zebra trots off to the farm end of the farm where he spots an enormous great bull.
He trots over and says, "I suppose you're another cow?"
The bull glowers at him; "Fuck off - I'm a bull".
"And what do you do?"
"Get those fuckin' pyjamas off and and I'll show you".
Jim Carroll