People do not swallow large numbers of spiders during sleep. A sleeping person makes noises that warn spiders of danger. Most people also wake up from sleep when they have a spider on their face. https://en.wikipedia.org/wiki/List_of_common_misconceptions_about_science,_technology,_and_mathematics#:~:text=People%20do%20not%20swallow%20large%20numbers%20of%20spiders%20during%20sleep%2E%20A%20sleeping%20person%20makes%20noises%20that