I used to think that the proper term for anus was "poonis". After all, you pee with your penis, so you must poo with your "poonis". Logical, eh?
A childhood belief about rude bits

others believed things like this
- I believed as a child that the proper name for windscreen wipers was "lig-logs".— Ray
- I used to think that Frankie Avalon sang, "Hey Penis, Oh, penis..." instead of "Hey Venus."Anon
- I used to believe that gay sex involved a man sticking his penis inside another man's penis.Anon
- I used to believe that gay guys had sex by sticking their penis in the other's penis.— Fanbrat
- My brother thought the trees made the wind...logical.— peter
- i used to think that oral sex was just a fancy term for kissingAnon