I used to live in the Southern states and there was a soda named 'Mello Yello', when I heard Donovan's song "Mellow Yellow," I thought he was singing "They call me Mello Yello" and I stopped drinking Mello Yello forever.
A childhood belief about misheard lyrics

others believed things like this
- I thought there was a legal drinking age for soda (I had always been told that soda was not for children).— Dial Zero
- When I first heard the song "Constant Craving" by KD Lang, I thought she was singing "God save gravy."Anon
- as a young child i thought poo was brown from eating chocolate and pee was yellow from drinking apple juice!Anon
- When I first heard Matt Monro's song "Born Free," I thought he was singing "Porn Free."Anon
- I used to believe that milk was what cows peed. Never stopped me from drinking it though!
— Reuben - I thought that when I got older "they" would invent a cure for death and I could live forever.— wishful thinking