Little Johnny (you know who he is, the naughtiest kid in class) was in class one day, and the teacher said:
OK, class, we’re going to go through the alphabet and I want you to give me a word starting with the letter. We’ll start with “A”.
Little Johnny’s hand went straight up. The teacher didn’t call on him because she just knew he’d use an inappropriate word, like “asshole” or worse. So she called on Suzie.
“Teacher, ‘A’ is for ‘apple.”
“Very good, Suzie. Now who has a word for ‘B’?”
Little Johnny again raised his hand, eager to answer the question. The teacher, just as eager to keep the answers appropriate, passed on Little Johnny, and called someone else. She did this through much of the alphabet, each letter, Little Johnny raising his hand, the teacher calling someone else so Little Johnny wouldn’t say something inappropriate.
Then the teacher gets to “R”. Of course, Little Johnny’s hand was eagerly raised. Giving it some thought, the teacher came to the conclusion that there were no words that Johnny should no that started with “R” that would be bad words. So she called on Johnny.
“Johnny, do you have a word for the letter ‘R’?”
Johnny replied, “Teacher, ‘R’ stands for ‘rat’...a big shittin’ rat with a fuckin’ twelve-inch tail!