When i was about 9 me and my older cousin, who was 13 at the time were driving home from school in her mother's car when the song "Im Horny" came on.
The lyrics are "Im horny,horny,horny,horny,sooo horny, im horny,horny,horny tonight!"
Unfortunately i didnt know what horny meant and assumed they were singing "Honey".
I proceeded to sing along, and was totally offended when my aunt and cousin burst into hysterics.
A childhood belief about misheard lyrics

others believed things like this
- I used to think a second cousin meant a cousin’s cousin.— Carlos Almonacid
- My cousin's mom told my cousin that pop makes you short. He probably believed it.— Molly
- I used to believe waffles were honey combs and thats why you would pour honey on it — Gaby
- My mum said that when I used to sing "noahs arc" at school I would sing "who built the arc, no one, no one"— Clare
- I used to believe that Paul Simon was my cousin. He isn't.Anon
- 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