The idea of humans swallowing spiders while sleeping is a well-known myth, but there's no scientific evidence to support it. Here's why:
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Spider behavior: Spiders tend to avoid humans and prefer to stay in quiet, undisturbed areas to build webs and catch prey.
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Human reflexes: Our bodies have built-in reflexes like coughing, sneezing, and swallowing to clear anything that enters our airways or mouth unintentionally. These reflexes would likely prevent a spider from entering unnoticed.
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Sleeping position: Most people sleep in positions that wouldn't allow a spider easy access to their mouth.
So, while the image of a spider crawling into your mouth at night might be creepy, you can rest assured it's highly unlikely to happen.