The usual dog/cat sex thing and also the reason you couldn't understand animals was because they where speaking a different lanuage sort of like spanish or something
A childhood belief about cats and dogs

others believed things like this
- I used to believe that people who were speaking foreighn languages were just speaking gibberish.— Zoe
- I thought I had X-ray vision and could talk to animals and they could understand me.— Kitty Lover
- I used to believe that Spanish and Italian were the same language;Spanish was for boys and Italian for girlsAnon
- I thought “guerrilla tactics” meant fighting like a gorilla— beating your chest and that sort of thing.— Kai
- I used to think that boysenberry was poisonberry and couldn't understand whay anyone would want to eat it.Anon
- I could NOT understand why, if a pen worked on paper, it couldn't also write in thin air.— Can you guess what it is yet?