My mom used to act out the one-person, "You must pay the rent!" scene for my sister and me. It's the one where a comb or similar object is used to signify when the person is playing either the landlord, woman, or hero. Well, it always ends with the landlord saying, "Curses! Foiled again!" For the longest time I believed the phrase was, "Purses, boiled again!!" This would always conjure images in my head of a bunch of purses sitting in a huge pot of boiling water. I wasn't sure why purses being boiled was a bad thing to have happen to you, but I had no reason to question it. Eventually I repeated the phrase in front of my mother one day and she had a pretty good laugh before correcting me.
A childhood belief about speaking

others believed things like this
- I thought the phrase "At one's disposal" meant you should dispose of the person or thing.— Geirskogul
- I didn't understand about boiled eggs until my Mum explained I wasn't supposed to eat the shell as well.— Chris
- I used to believe that tapioca was made from boiled used kleenex.— Abby
- I somehow got the idea that if I boiled a rock, it would come to life. My dad disproved that...Anon
- I used to believe brussel sprouts were holy because they had a cross marked in the top when mum boiled them!— Ali Brill
- You must break the bottom of egg shells after finishing a boiled egg or witches will use them for boatsAnon