By a zookeeper
I was reading up on animals the other day, as I do. And I learned that, statistically speaking, you are always within three feet of a spider, and at least eight spiders will crawl into your mouth while you sleep over the course of your lifetime.
That's pretty weird, but none of it bothered me too much. How much harm can a spider do, you know? Then I got to thinking: If eight spiders crawl into your mouth, how many other animals have poked around in there as well?