Nope, says MythBusters. There's no evidence that spiders secretly crawl into our mouths while we're sleeping. Even if you were lying perfectly still, your breathing would scare a spider off, so it's unlikely to hang out around your mouth. Alas, the bad news: You probably consume more spiders when you are awake -- in your food. Here's why: The Food and Drug Administration guidelines allow a certain level of whole insects or parts in some food products, such as those containing fruits or vegetables. Yum.