Attention, grammar police:

A smart but somewhat unsophisticated West Texas boy had won a scholarship to Harvard. Like most freshmen, he was completely lost his first day on campus. He spotted 2 upper classmen (recognizable by their sweaters) and flagged them down to ask directions. “Excuse me, fellers, can y’all tell me where the library is at?”
One of the upper classmen peered at him disdainfully, “Of course, my good man, of course. But first, my good man, this is HARVARD and here at HARVARD we do not end a sentence with a preposition!”
The country boy thought for a second and said, “Okay, can you tell me where the library is at, ASSHOLE?”