I used to believe that when there was more than one reservoir, one was for collecting hot water and the other stored cold!
A childhood belief about water

others believed things like this
- I didn't think you could put out a fire with hot water - only cold water would do.— Katti Pytt
- I used to believe pee was stored in your stomach and poo was stored in your back.— Rob
- I used to believe that hot water was red and cold water was blue.Anon
- That the tooth fairy drove around in her green Volks Wagon Collecting teeth from all the children.— Wanda Trytten
- I used to think that poop was stored in your buttocks and that's why they're squishy.Anon
- i used to think that your butt cheeks is where your poop was stored. Anon