“You swallow eight spiders a year in your sleep”

The idea that humans unknowingly swallow spiders during sleep is a widespread urban legend, often attributed to a journalistic hoax. One popular theory suggests its origin traces back to a 1993 magazine article where the "eight spiders a year" claim was fabricated as a joke to demonstrate how easily misinformation could spread. Ironically, this deliberately false fact took on a life of its own, becoming one of the most persistent myths.

Scientifically, there is no evidence to support this claim. Spiders are not inclined to approach or enter the mouths of sleeping humans. Our bodies emit vibrations from breathing and heartbeats, which spiders, being highly sensitive to such movements, perceive as a threat or simply a large, unappealing environment to avoid. Furthermore, most people sleep with their mouths closed, and even if open, the sensation of a spider crawling on the face would likely cause a person to wake up or swat it away. Spiders prefer quiet, secluded areas for their webs and are not interested in exploring the warm, noisy, exhaling environment of a human mouth.

This myth persists largely due to a combination of factors, including widespread arachnophobia and the "ick" factor of such a thought. The idea of being vulnerable to a creepy-crawly while unconscious is unsettling and memorable, making it easily shareable. The lack of direct evidence to disprove something so inherently creepy also allows the myth to thrive, despite scientific consensus that it is entirely unfounded.