When I was about 4 I asked my mum what my tongue was made of and she said "blood vessels." For the next 14 years I thought that my tongue was made of arteries and if I cut it badly I would bleed to death.
At age 18 I went to medical school and was really annoyed with my mum after a couple of weeks there when I found out my tongue is mostly muscle. Her excuse is that she didn't know so she just made up an answer. Years of worry for nothing!
A childhood belief about general

others believed things like this
- i always thought that people always died with their tongue hanging out— Ernesto Shredder
- I used to believe that my name meant tongue. strange? I think so — Bella
- I use to believe that if you told a story/lie you would get a bump on your tongue.Anon
- I used to believe that you had to have your eyes closed and your tongue sticking out for you to be dead! — pinkgreencrazy
- I used to believe that if a dog stuck their tongue in your mouth, you would get worms no matter what.— ` [ A ] m a n d a .
- i was told that if i kept biting my nails i would grow hairs on my tongue i was 10 yrs old by the way— charlotte anderson