My mother told me that when she was little a girl told her that waving the finger meant "hi!".So she waved it at someone in the next car and got in trouble for it.
A childhood belief about swearing

others believed things like this
- My dad told me that when he was little, he thought the trees waved back and forth to make the wind blow.— casey
- My mother told me that when the icecream man played music that meant he was OUT of icecream.— B. Jones
- My mom told me that if I picked my nose, my finger would stay there someday!!— baxter
- my grandpa told me if you pick your nose too far then a snail will bite your finger off haAnon
- I used to believe that a half moon was gods finger nail, and his finger was pointing downwards.— clo
- My mother used ot tell me that if I picked my nose the 'Nose Spider' would bite my finger off.— Melanie