I misheard the line 'a come-on from the whores on Seventh Avenue' in the Simon & Garfunkel song 'The Boxer'as 'a come-on from the HORSE on Seventh Avenue'. I had seen on TV the horse-drawn carriages in Central Park and believed that the horse felt sorry for the lonely boxer and winked at him to invite him for a carriage ride!
I also heard 'Destination- Bangor, Maine' as 'Destination- back again', probably because I come from a railway town where lots of men drive trains up and down the same stretch of track every day.
A childhood belief about misheard lyrics

others believed things like this
- I told someone once that my favorite band was the Funkel brothers- Simon and Garth.
(Simon & Garfunkel)— Josie - When I was little i believed that Madison Avenue was a person.Anon
- I used to think the song "Walk this way" by Arosmith went horse and sleigh insted of singing walk this way.— Derek
- a donkey is just a small horse.Anon
- I used to think that beer was horse pee. Probably because that's what my mom told me...— Kara
- When I was three I used to believe that cow and horse are wife and husband.— xenia