When I was young, I grew up in Wrexham, North Wales, where there's a district called Bersham (where the steelworks were). I used to believe that Sham 69's Hersham Boys song was in fact about a bunch of party-animal Wrexham lads from said district. How wrong I was.
A childhood belief about songs

others believed things like this
- That the District of Columbia was an island in the Carribean. I believed this until I was about 19 yrs old. Anon
- when I was young, I thought Denmark was a state, just like Deleware and North Dakota.— valerie
- I used to believe that an oilskin actually came from an animal called an Oil.....— Sally
- I used to believe that little boys grew up to be girls and little girls grew up to be boys. — Darin
- I thought the song "Party Time" by Moby was actually saying "heart attack" (this was before I knew the title)— Elviessa
- As a young child I thought that sheep and poodles were the same animal.— Jane