Inspired by the first chapter of The Dryad's Riddle (which, by the way, is awesome), I have decided to share a riddle I made up a while ago.
You are a detective working for a police agency in downtown Brooklyn. While you lounge in your office, putting off paperwork, a cop rushes up to you with a clothespin on his nose to tell you, after a few unsuccessful attempts and a handwritten note, that a naturally smelly criminal has smuggled 100 pounds of bratwurst and has now escaped the crime scene.
With the nose of a hound dog, you track the criminal through the streets of Brooklyn, past dumpsters with rotten fish carcasses spilling out, street vendors with sweaty shirt stains, and unclean bathrooms with graffiti on the walls. Finally, you find yourself in a strange, whitewashed room with the ventilation set up so that the remarkably rank stench you've been tracking flows equally from all directions.
Thus you cannot determine which of the 5 doors in front of you to open by merely using your nose. Each door has a wooden letter on it, one with an "M," one with an "N," one with an "O," one with a "P," and the last one with a "Q." If you open the wrong door, the criminal will know that you're there and run out through one of the other doors in the building. If you take too long, you might pass out.
Which door should you open to keep your job?
If you don't want to ruin the riddle for everyone visiting this thread, you should either answer the riddle through private message, black out your text like this so that the answer can be seen by selecting/highlighting the text, or content yourself with the knowledge that you have solved the riddle.