When I was 4 I had an infant cousin who was a little boy. When he was getting his diaper changed I saw this bizarre wrinkly thing between his legs. I didn't have one so of course I thought it would eventually dry up and fall off (like a scab) and my cousin and would be normal.
After I found out that little boys got to keep their wrinkly gizmo I felt a little cheated but I'm not sure why.
A childhood belief about rude bits

others believed things like this
- I used to believe that old people were wrinkly because they spent too much of their life swimming— Amy
- My cousin's mom told my cousin that pop makes you short. He probably believed it.— Molly
- I used to think a second cousin meant a cousin’s cousin.— Carlos Almonacid
- that cats were only girls and dogs were only boys. I definetly didn't get the whole reproducing thing yet.— Jamie
- My cousin, who's my age always thought there were two n's in the alphabet. 'l-m-N-o-p' and 'w-x-y-N-z'— Ashley
- I have a cousin who thought he could run faster when he got new shoes .. Anon