When I was around 4, I once heard an adult say "Oh, s**t" under his breath. It could have been by dad, but I dunno. I asked him what he said, and he told me he said "yittybit." To this day, I still say "Oh yittybit!" at school when I'm mad.
A childhood belief about swearing

others believed things like this
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj
- When i was litle i used to think i only had to breath when i wanted to.— molly
- i used to believe that you could breath through the the hole in the end of your penis when you were swimming.Anon
- when i was a little kid. i used to think that when u hold ur breath ur heart stops.. LOL :P — Annonymus
- when i was a kid i used to think farts were another person in my tummy talking and he had bad breath— JOEY
- I used to think that if you held a turd in for more than an hour it would give you bad breath— phil