My grandfather would always eat dessert even if he had not finished his main course. He used to tell us that desserts went "into the pudding hole" so you would still have room for dessert even if you were full-up with your main course. I used to think your main courses and puddings went into separate stomachs.
A childhood belief about eating

others believed things like this
- All colleges had campuses in the state of Maine not just a main campus. — Michael
- I always believed that we lived in Manchester (we didn't) but it was always the main place on the local news!— Richard M
- I used to believe that all dessert was birthday cake.— David
- For the longest time I thought that tapioca pudding was really fish eggs in pudding.— Liz
- I used to believe that the rice in Tapioca pudding was fish eyes. To this day I cannot eat Tapioca pudding.— Stephanie
- Before I went to a planetarium for the first time, I thought it was just a room full of plants. Anon