I used to think that boys didn't get their penis until they were 18 which was legal adulthood!
A childhood belief about rude bits

others believed things like this
- I used to believe that condoms were weared by girls and boys
both. And they both have penisAnon - I used to believe there was a legal age limit to swearing.— sarah
- I believed until near adulthood that when I was 6 or 7 I had actually flown for several feet in my back yard. — Jane S Poole
- Well into adulthood I thought that a local anesthetic meant one from the area near the hospital..— D'sparil
- I thought there was a legal drinking age for soda (I had always been told that soda was not for children).— Dial Zero
- I used to think that Legal and Illegal meant the same thing (illegal)— Dhruv