When I was about 5, I believed that if you put your arm around your friend's shoulders, you'd have a one-armed baby when you grow up. I spent hours praying to God everytime I forgot and put my arm around my friends. I used to throw fits when people interrupted me because it meant I had to start my prayer all over again - I got interrupted a lot. I'm 24 now and my family members still use the story as a trump card to win any and all arguments with me.
A childhood belief about reproduction

others believed things like this
- I believed that if I swallowed my phlegm I would die. I spent hours spitting it out into the toilet.— chunky munky
- I used to think it was an amazing coincidence that all my members of my family had the same name.— Raj
- I used to think you could be gay or lesbian from kissing your own family members of the same gender.Anon
- In kindergarden my friend told me that there were 24 hours in the day and 15 hours in the night.— Cari
- I thought a Debit card was actually called a Debt card.— Kilgore
- I thought that a "student visa" meant to use a credit card while travelling.Anon