For Why!!! (Best funny grammer fix)?

That reminds me of the story of the Texan boy who ended up at Harvard. His first day he approached a distinguished gentleman on campus and asked, "Pardon me, sir, can you tell me where the library's at?" The man pulled himself up to his most pompous height, looked down at the freshman and said, "My dear boy, I am a professor and we here at Harvard never end a sentence with a preposition."

The boy furrowed his brows, and considered this for what seemed the longest time.

"Well then," he finally replied, looking the man straight in the eyes, "can you please tell me where the library's at..................A S S H O L E???"

"for" does not come before the words why,what where and how.

For what reason you would do that.