When reading the packages for lotions, soaps, hairspray, etc. I thought "External use only" meant you could only use it if you had an extreme need for it.
A childhood belief about reading

others believed things like this
- I used to believe that hairspray was made of grapes! =) Does't it smell grapey to you? XD— Jaime
- people on soaps didn't know they were being filmed— katherine
- Until I tried it in 3rd grade, my parents told me that if I ate paper my poop would come out in packages.— The Mailman
- Soap Opera's are Soaps that sing Opera to you while you take a bath. Right???— Kid 1990
- When I was about 5, I thought that English was the reverse reading of Turkish.— sel
- I used to wonder when reading the obituary column how people always managed to die in alphabetical order.— diane