When I was 3 or 4, I learned in Sunday School that God is the Father. I took this literally and belived that God was my father, being too young to understand the theological implications of such a thing. Once I got upset with my "earth Dad" and told him that he wasn't my real Daddy. I'd imagine that it sparked an interesting conversation between my parents until they figured out I was just confused rather than alerting him to Mom's infidelity with another man.
A childhood belief about characters

others believed things like this
- I never did understand why it was "Our Father, who aren't in heaven".— Edith
- I used to be really confused about the whereabouts of God.
On account of: "Our Father who Aren't in Heaven".— Tania Bradshaw - I thought that a "sugar daddy" was a father who let his kids eat all the sugar they wanted.Anon
- I used to believe that Andy Rooney, of 60 minutes, was my real father!— KM
- When i was child, i used to think my father was my father christmas.— BeB's
- My father told me that Frenchmen had three legs.Anon