When my mum used to pick me up from school I was sometimes announce that I was thirsty, my mum would reply she was friday. I'm from glasgow, scotland - saying thirsty in a loose accent sounds like 'thurstay' ergo 'thursday' so this was my mum's way of gently chastising me for poor enunciation, by replying in an equally nonsensical way.
I didn't realise this til I was 15 - I had assumed Friday was just a way of saying you were hungry....
A childhood belief about speaking

others believed things like this
- i used to believe that when trees were thirsty they would tell the sky and it would rain.— Raya
- i used to believe that every friday night Freddy Kruger was under my bed and he was going to kill me— c
- Phil Collins song "I missed again" - I thought it was "I pis*ed again" - didn't realise he was an alcoholic?!Anon
- I once refused to believe in Thursday. I'd heard there were seven days in a week, but could only name six.Anon
- I used to think that teachers always had to officially announce to the whole class why someone was off sick.Anon
- All the people that lived in Scotland were girls— The Ice Cream Sandwich Monster