I used to believe that Elvis sang " she rode a pony" instead of "she wrote upon it" in the song return to sender, I always imagined the girl sitting in a farm and riding her pony to return the letter as soon as she got it!
A childhood belief about misheard lyrics

others believed things like this
- I only found out last year that a pony is not a baby horse.— Mescaline Frumblethond
- When I was young, I really used to believe that 'R.I.P.' (on a gravestone) meant 'Return If Possible.'— Colin
- I Used To Believe In The Scab Fairy, That She Would Pay You In Return For Those Scabs!— KellGirl
- After watching Return of the Jedi, I belived that whenever you died you just dissapeared.— Nano
- That Madonna sang "I'm a cheerio girl" instead of material girl— HN
- for my little sis -
Paul McCarty song "Band on the Run" but when she sang it it was "Man has the Runs"Anon