We had one of those automatic ice-makers in our freezer when I was growing up. I used to believe that the noise it made was a man named Stanley who made the ice. I made the mistake of telling that to my grandmother, who put a little plastic man and woman in the freezer, so that when I looked to see if Stanley really existed, I found not only did he exist but had a wife!
Stanley's wife never got a name, though. She was always just referred to as "his wife". It took me a long time to accept that Stanley didn't really make my ice.
A childhood belief about around the house

others believed things like this
- i used to think a small man named homer lived in my grandmother's freezer and made ice. — ana
- I had my wife convinced that Steven Hawking made his fortune as the original voice for the speak N spell toy.Anon
- I always thought that it was "Afully Wedded Wife" Not "lawfully wedded wife"— Sarah
- I used to believe that a widower was a guy who killed married husbands to make thier wife a widow— Jessica
- I believed that when you got married (the wife) you didn't have to work. Boy, was I fooled. ha ha ha— Patty
- I used to think MARIA is the WIFE of JESUS!— Chrono