For the longest time as a child, my father thought Trooper's "Raise a Little Hell" was actually "Raise a Little Elf", having first heard it around Christmas... It was only when he asked why Christmas songs were being played out of season that he learned the truth.
A childhood belief about misheard lyrics

others believed things like this
- When i was child, i used to think my father was my father christmas.— BeB's
- I was told that for every christmas carol i sang before christmas time santa would give me one less present!— K
- Do you really mean to tell me that father Christmas is a myth?
Finally......— Peter (Aged 70) - I used to think that Father Christmas stole toys from Smyths.— Shovel Tem
- We didn't have a chimney in our house. Father Christmas had to come in through the letter box.— Ginnean
- "Christmas time
mistletoe and brine..."— Santa Puncher