My grandmother told my father when he was young that whenever you farted, a "pooter tail" came out of your butt, which was what made the sound. He would back up to a mirror and try to see the pooter tail for years! He told me this when I was young enough to believe in it (and not realize that his mother was messing with him), so I started doing it! I never saw the pooter tail either, but I always imagined it to be a long, skinny flesh colored tube with an orchid at the end of it. The tradition continues!
A childhood belief about farting

others believed things like this
- We told our little sister that she had a long bushy tail and she fully believed us for ages!!Anon
- I used to believe that a cat's butt hole was on the tip of his tail.— PANTS
- When I was very little, I used to believe that bacon came from the tail of a pig because it was curly!!— Audrey
- I used to believe that if I wagged my dog's tail, it would cheer my dog up.— GED
- I used to believe that if you hit your tailbone, a tail could grow out of it.— Ida
- My Dad convinced me that Manx cats had no tail - and only three legs.— Jim