When I was a kid, there used to be a car commercial for a local dealership. The catch phrase was "Go see Cal" and was sung. For years, my sister thought they were singing "Pussy Cow."
A childhood belief about adverts

others believed things like this
- I used to believe that kittens came from pussy willows.— hope
- i used to think that if i didn't celebrate my birthday each year my younger sister would catch up with me— q
- I always thought that "Staying Alive" by the Bee Gees was sung by Aretha Franklin.Anon
- i thought that the phrase "jet lag" was actually "jet leg" until i was 17...— truffles
- Because of a commercial I seen on tv, I thought the whole world was the size of the of the U.S.— Paulette
- I thought the phrase "At one's disposal" meant you should dispose of the person or thing.— Geirskogul