A teacher cautiously approaches the subject of sex education with her fourth grade class because she realizes Little Johnny's propensity for sexual innuendo. But Johnny remains attentive throughout the entire lecture. Finally, towards the end of the lesson, the teacher asks for examples of sex education from the class. 来自幽默学英语网http://www.linkstom.cn/humor/
One little boy raises his hand, "I saw a bird in her nest with some eggs." 
"Very good, William," said the teacher. 
"My mommy had a baby," said little Esther. 
"Oh, that's nice," replied the teacher. 
Finally, little Johnny raises his hand. 
With much fear and trepidation, the teacher calls on him. 
"I was watchin' TV yesterday, and I saw the Lone Ranger. 
He was surrounded by hundreds and hundreds of Indians.
 And they all attacked at one time. 
And he killed every one of them with his two guns."
 The teacher was relieved but puzzled, "
And what does that have to do with sex education, Johnny?" 
It'll teach those Indians not to fuck with the Lone Ranger."