There is a Christmas song that goes "Mary's boy child, Jesus Christ, was born on Christmas day..." But I always thought that it was saying "Where is Pork Chop? Jesus Christ! He was born on Christmas day..." I thought they were actually talking about the character Lamb chop but had just gotten his name wrong....I used to sing it that way too! O_O
A childhood belief about misheard lyrics

others believed things like this
- I believed that Jesus Christ was the son of the Christ family, i.e., Mary and Joseph Christ.— David Araújo
- I used to believe the Christ was born
on Christmas Day and crucified the
following Easter.— William Golding - In a religious song, instead of “Jesus Christ” I heard “Cheese is Prize”— EJ
- when i was little i thought that jesus delivered presents on christmas not santa .— gaby
- When i was little, I used to send Jesus birthday cards on christmas and thought he would read them in heaven.Anon
- I used to think it was against international law, religious principles, etc. To be born on Christmas Day. :PAnon