I misheard something my parents said and for years I believed that if you accidentally ate a mussel without removing its "beard" (the fibre it uses to attach itself to rocks) you'd be paralysed from the waist down!!
I didn't dare eat mussels for many years - and I'm still a little wary...
A childhood belief about dangerous food

others believed things like this
- I used to believe that I would be paralysed if I sat on the floor for more than 20 minutes— bittergrass
- Until I was about 12 years old I believed that homeless people were made up by my parents to scare me.— Angela B.
- I believed that kissing a toad would give you warts, but it never stopped me from a dare.— Kirstin
- For years and years I believed that tuna must be really little fish because they came in such small cans!!— Gisela
- when i was kid, i believed dynamite was something you sprayed on rocks and then they would dissapear— big googely
- For the longest time I used to believe that the male ballet dancers were naked from the waist down.Anon