Poetry or prose

The third-grade teacher was teaching English when she repeated for her class, "Mary had a little lamb, whose fleece was white as snow. And everywhere that Mary went, the lamb was sure to go." She explained this was an example of poetry, but could be changed to prose by changing the last line from "the lamb was sure to go" to "the lamb went with her." A few days later, she asked for an example of poetry or prose. Little Johnny raised his hand and said, "Mary had a little pig, an ornery little run. He stuck his nose in Mary's clothes, and smelled her little..." Little Johnny stopped in mid-sentence, then turned to the teacher and asked, "Do you want poetry or prose?" "Prose," the teacher replied. So Johnny continued, "... asshole."