This isn't actually my belief, but my brother in law's. We were watching something on the Discovery channel one night, and apparently it had something to do with sloths. So of course they had footage of the sloth eating and swimming and hanging on a tree branch. Well, my brother in law came down stairs and was like "What kind of animal is that?"
"A sloth," I replied.
"No way," he responded, "Nu uh! Are you serious?"
"Yes, and they're so slow that they have slime growing on their fur."
"Wow. I thought sloth was just something they made up in the Bible when they were talking about lazy people."
(Note: he's like 15 years older than me...)
A childhood belief about general

others believed things like this
- I used to belief sloths lived in trees outside my childhood home. My older sister told me so.Anon
- My older brother once told me that Aussie shampoo was made from kangaroo pee. I avoided using it for years!— Annie
- When my brother was 5 I use to swap a $5.00 note for lots of coins because he thought that I had more money— MATT NEWTON
- My brother told me that I would turn into a boy when I got older. It made me cry.— Sarah
- My older brother made me believe that wristwatches were powered by tiny Japanese men inside them.— Outsider
- My brother that is 6 years younger than me used to believe that in seven years he would be older than me.Anon