I used to think the phrase "stark raving madness" was "star craving madness". It seemed a peculiar turn of phrase, as I'd never heard of anyone craving stars. On the other hand if anyone did crave stars, it is understandable how that might be associated with madness of some kind.
A childhood belief about speaking

others believed things like this
- When I first heard the song "Constant Craving" by KD Lang, I thought she was singing "God save gravy."Anon
- I learned in the first grade that the Sun was a star just like all the other stars, only it was MUCH bigger.— Geoff
- i used to believe that stars really were star shaped, i realised at the age of 34 how wrong i was.Anon
- when i was was little i thought that pop stars were stars in space would pop— roman honytoast
- I used to think stars were really shaped like you draw stars!Anon
- I used to believe that it was the Star Wars "Tri-ology" instead of the Stars Wars "trilogy".— keith Key