Having read Charlotte's Webb as a kid, I became petrified whenever my parents or brothers killed a spider that had been in my room. I would beg them not to kill them, but just to catch them in a jar and pop them out the window instead. This was because I firmly believed that as spiders have so many hundreds of babies, if one of them were killed in my room, all of their hundreds of brothers and sisters might come and 'get me' and I'd wake up in the middle of the night covered in the things!
I'm 29 now and still can't kill a spider - only chuck them out the house safely!
A childhood belief about creepy crawlies

others believed things like this
- I used to beleive that if we didn't spray the ants, there would be hundreds of them in my house taking over.— Rob
- When I was liitle, I used to believe that if a spider would bite me than I would become Spider-Man!!!— IronManxD
- I used to tape my mouth shut at night in case a spider would come along and make a web in my belly.Anon
- When I was little i thought grandparents had to be hundreds of meters tall... Anon
- When I was little I believed that a night a monster will came and kill me.❤️🥺— @natalia_rd_
- I knew lightning could come in through my bedroom window and kill me.
— Cyn