Pink Floyd- Brick Wall.
I used to believe it was "we don't need no fart control" in the second line there.
A childhood belief about misheard lyrics

others believed things like this
- I used to think the line in Pink Floyd's Another Brick in the Wall was "No dogs allowed in the classroom."— Gretchen
- I was sure my stuffed dog "Floyd" could talk, but he chose not to.
— Cyn - i knew that if you ate beets your urine would turn pink and i thought if it was pink, then you could drink it.— JP
- I used to believe that the remote control could control all the things in my house, including my dog.— Felipe
- i thought 'locus of control" was spelled as "locust of control".. like the bugAnon
- I thought pink lemonade came from pink lemons.Anon