I misheard kids talking about the "middle finger" and thought for a very long time that it was the "little finger" that was a rude gesture.
A childhood belief about swearing

others believed things like this
- I used to believe that a half moon was gods finger nail, and his finger was pointing downwards.— clo
- I used to believe that my grandpa had a special power that made him fart each time I pulled his finger. — confused
- When I was little, I thought you had to put a finger under the water to make it hot. — M_2
- When I was a kid I thought if I bit my finger off and swallowed it it would pop back into place— Mike
- Never point at a grave, if you do your finger will rot off.— KL.R
- I used to believe that if my finger was ever cut off, it would grow back.— Chrissy