I'm not sure where I picked it up, but I used to believe that the word "ejaculation" was just another term for a coughing/sneezing fit, or shivering.
So one day in grade three I burst out hacking and the young female teachers goes "Liam, are you okay?"
and I said "Don't worry, I'm just ejaculating."
Another time it was extremely cold in my room so I went downstairs and said, "Mom, could you turn the heat on? It's so cold in my room that I started ejaculating."
God.
A childhood belief about rude bits

others believed things like this
- I used to think "premature ejaculation" was a boy ejaculating before he hit puberty.Anon
- I thought that cold was an actual, positive force and not just the absence of heat— terberous
- I thought that a woman got pregnant kind of like catching a cold, by being around her husband for a long time.— No Name
- that coleslaw was cold slaw. Anon
- I used to think the "Cold War" was a war where countries tried to freeze each other to win the war. Anon
- Ever since I was 8, i never ate chili because i thought it ws cold.— James