I used to think that 'testicles' was the word for the arms of a squid or an octopus.
A childhood belief about general

others believed things like this
- that pickles were octopus legsAnon
- My uncle convinced me that if you ate octopus, the suckers on the tentacles would suck your tongue out— Minnie
- From the Carpenters hit I always sang "calling octopus of interplanetary craft" instead of "occupants".— Paul
- I used to think pee was in your testicles.— R.G.
- When I was young I used to think my testicles held the pee!Anon
- I used to believe that testicles were called tenticlesAnon