"Little Jonny jokes - Sex Education" joke

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.
One little boy raises his hand, "I saw a bird in
her nest with some eggs." "Very good, William," cooed 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."