When I was about 6 I was told you can't go swimming after eating a meal because you'll get a cramp and drown. This didn't scare me. Instead I wondered how anyone could drown when all they had to do was just keep swallowing the water until they could stand again.
A childhood belief about eating

others believed things like this
- You had to wait an hour after eating ANYTHING, even one M&M, before swimming. Anon
- I thought tonic water was toxic water and wondered why would anyone drink it if it is toxic?— Dr.Badguy
- I didn't think you could put out a fire with hot water - only cold water would do.— Katti Pytt
- I used to think that adam and the ants' stand and deliver was 'stand in your liver'.....— wook
- I used to think that when you swimming 'Freestyle' was swimming any way you want.Anon
- my Dad told me ice rinks were defrosted every evening and turned into swimming pools— neil