It could be to do with something called “ablaut reduplication”. Very basically English has a - kind of - untaught sound order that native speakers inherently apply to the language. Wikipedia will have an article to explain it better. Specifically the vowel order I-A-O. A great example is the phrase “Bish bash bosh” which is getting coverage recently. (One notable exception is “shit, shower, shave” but that is probably down to the chronology of the actions.)
Shhh! Nobody tell them about “inside out.”
Why isn’t it outside in?
It could be to do with something called “ablaut reduplication”. Very basically English has a - kind of - untaught sound order that native speakers inherently apply to the language. Wikipedia will have an article to explain it better. Specifically the vowel order I-A-O. A great example is the phrase “Bish bash bosh” which is getting coverage recently. (One notable exception is “shit, shower, shave” but that is probably down to the chronology of the actions.)
Spot on insight :)