My aunt Toodie told us a variety of scary tales when we were kids. Among them was that one's anus was held together by something she called a "pucker string".
Aunt Toodie went on to warn us that an especially large, hard stool might break the pucker string, at which point an emergency operation would be necessary to prevent our "guts" from falling out through the de-puckered anus.
As a child the idea thought that my pucker string might break terrified me. It was only until about the fourth grade, and after a few embarrassed furtive question and answer sessions with trusted playmates, that I finally figured out that a "pucker string" was just one of the many products of aunt Toodies' spectacularly inventive imagination.
A childhood belief about general

others believed things like this
- My mother, the good Catholic, thought that Jesus, being a string bean (supreme being) was really skinny.— Mark D
- i used to think my aunt sandra was aunt bannana.Anon
- I was sad for many years because my aunt once told me I would go to hell for farting in church!— Tara
- my aunt told us there was a special chemical in the pool that would turn red if we peed in it.Anon
- I thought my aunt was Tina Turner actually, but she is keeping this as a secret...
— sel - I thought that the song "Hands off she's mine" by The English Beat was actually saying "Anton, she's my aunt"— Nate