In Mr. McNab's English class one day we were supposed to be brainstorming ideas for essay topics, and Mr. McNab was writing them all on the board.  One of our female clalssmates (I wish I could remember who) suggested a research paper on why the legal drinking age should be lowered to 18, or even 17.  Without hesitating, Mr. McNab said, "Oh, there's a whole section in the library on that." I guessed he was being facetious. I'm not sure if the girl wrote the paper or not.