I always loved the song "Puff the Magic Dragon" but I also thought it was the saddest song ever, and sometimes it would make me cry, but I liked it anyway.
I always thought the little boy Jackie Paper died and misheard the lyrics "Painted wings and giant rings make way for other TOYS" as "Painted wings and giant rings make way for other BOYS", since Jackie Paper had died.
I continued to believe this for a very long time and was very relieved to learn out the truth.
A childhood belief about misheard lyrics

others believed things like this
- My mum's aunt gave her daughter a copy of Jackie magazine. She refused to read it as her name was not Jackie.— Helen
- Since the girls name Jackie is short for Jacqueline, I thought the boys name Jack was short for JackalAnon
- I thought buffalo wings were wings from a buffalo, for years I looked for their wingsAnon
- When I was a kid I loved to eat onion rings, until I realized that they were made with onions.— Beth Pärssinen
- when my friend was little, she used to eat paper, thinking it would make her read better.— hehehe
- i believe in the tooth fairy so much that i make paper bags for her!— Monster High girl