Me? I used to NOT beleive.
On my mother's forty-fourth birthday, when I was four, we did the thing where you shout, "ARE YOU ONE! ARE YOU TWO! ARE YOU THREE! . . ." All the way up to forty-four. And that was how I learned to count to forty-four.
Later, when I was counting to four on my own . . . I asked my older sister what number came next. She told me that the same pattern as with the previous numbers continued, and that forty-five came next. It made sense, I'll admit. It was a logical reply. But I didn't trust her, because she was always playing tricks on me.
So for a very long period of time, I refused to beleive that forty-five DID NOT come after forty-four, and anyone who told me otherwise was just trying to trick me.
A childhood belief about counting

others believed things like this
- My older sister used to beleive that when it rained, the angels in heaven were having a spitting contest— Doblica W.
- i used to beleive that if you chewed gum it woul give you warts in your mouth my sister told me this— sunney jim of the pearl
- i didn't beleive this, but a kid my sister knew thought if he screamed in a really high voice, he ran faster.Anon
- My mom told my sister that if she didn't eat her peas, her period would last for an entire month.— Maya
- I used to beleive that gasoline was made from dinosaurs.Anon
- I used to believe there was a limit on the numbers you could count — Carmen