Today I learned (through a random conversation with a woman who's an audiologist) that cockroaches can't crawl backwards.
I've seen plenty of cockroaches in my life, and somehow I've never noticed this.
Why is this important? Because, apparently, if a cockroach crawls into an ear canal, it can't get out. They can go in to your ear, but since there's no room in your ear to turn around, and since they can't crawl backwards, the only way to get cockroaches out of your ear is for a doctor to remove them with tweezers.
- Hence the title of my post.