When I was in elementary school, there were four water fountains side by side. They were labeled "Coffee, tea, milk shake, pee". "Milkshake" had the strongest flow, so everyone wanted to drink from the third fountain. "Pee" just trickled out, but sometimes some hapless kid would drink out of it. If he did, he would be teased for the rest of the day.
(Jacob, did you happen to go to the same school as I went to: Hillside School, in Berkeley, CA? Or was it a more widespread phenomenon?)
A childhood belief about classes

others believed things like this
- When I was in elementary school I use to think that teacher lived at school at their desks all year long.Anon
- When I was in elementary school nuns cam to our school. I thought that 'nun' meant they had no religion.Anon
- I used to think it was illegal for children to drink coffee— C.W.
- I always thought there was a drinking age for coffee, because it was an adult drink like beer and wine.Anon
- I used to think my elementary school gym teacher's name was "Jim Class".— Brandon Campbell
- When I was in elementary school, I believed my heart moved across my chest throughout the day.— Allison