When I was a little kid, I wasn't sure if the middle finger or the pinkie finger was the bad one. I think it came after I went out for tea at the ritz and put my pinkie finger up. I must have forgotten which was which! After that point, I was scared to put either finger in the upright position, or risk being a very bad person! (so i thought)
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
- Never point at a grave, if you do your finger will rot off.— KL.R
- 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
- I used to believe that if my finger was ever cut off, it would grow back.— Chrissy
- i used to believe that if i bit my fingernails then a finger would grow in my stomach— polly