As a 7 or 8 year old, I knew that water was a good conductor of electricity. I also knew that lightening was a deadly electrical source. Therefore, in my mind (was it told to me?), it was a big no-no to go pee in the toilet during an electrical storm because in some way the lightening could make its way up through the toilet through the water and then by extention . . . . I think you get the idea. During many a storm I found myself holding on until after the storm was over until I thought it was safe to go to the bathroom!
A childhood belief about thunder and lightning

others believed things like this
- When I was younger, I believed that squinting in a storm would make you cross-eyed... forever.Anon
- When I was a child, I used to believe that when there was a storm it was because God was angry.— Raul
- I thought that hydrogen was pure water (since I knew hydro- meant water) and H2O was impure some how— Hexetic
- I used to believe that if I flushed the toilet before I showered, I would take a shower in dirty toilet water.— Chris D
- One day when I was 6 I learned that the toilet was NOT a water cooler. :/— J.C.
- I used to believe that when lightening struck at night, it was turning the world into day for a few seconds. — Kristine