When I was being ugly to my parents or whoever, my parents would tell me I was acting like Hateful Hannah (my names not Hannah and I didn't know anyone with that name). The first time they said this I asked who that was and they told me she was a mean ugly old lady who lived at the dump and if I didn't get my act together they would take me to live with her. They used this threat pretty regularly when I was little. And I believed she was a real person for a long time after I stopped believing they would take me there.
A childhood belief about lies

others believed things like this
- We knew a woman named Barbara Hannah, and I thought she was was in charge of Hannah-Barbara!Anon
- I used to think Hannah Barbera was one woman...not two men. I didn't figure it out until I was about 15!— minkie
- I used to think it was true that only ugly girls poop and I thought I was an ugly girl because I poopedAnon
- My mom always told me if I made an ugly face it would stay that way forever.Anon
- When I was very young, I believed that my parents actual names were "mum" and "dad". — Margo
- I used to believe cows were ugly horses— Marlene