the number is only a guess but you do. I woke up one time and felt something in my mouth when I removed it looked part like a spider. you do eat some but now worries it won't kill you. some days it doesn't pay to snore in your sleep.
I read an old book years ago that explained all of this.There really is a certain number of spiders you eat in your sleep and a number of rat hairs you ingest just from eat in foods in your fridge and pantry.