When I was young, I used to believe that the french words "brouillard"( fog) and "gruyère" ( a french cheese) were the same words because of their prononciaton.
So, I used to believe that the fog was gruyère. So, When I went outside and there was fog I hold my breath because I didn't went to have cheese in my lungs
I don't know how I discovered the truth, but now I find my reaction really stupid, cute and funny.
A childhood belief about weather

others believed things like this
- At the time I thought the moon was made of cheese and with oceans of cheese— 123
- I used to believe that grilled cheese was called 'girl cheese,' and only girls could eat it.— Paige
- I usde to believe that 'camembert cheese' was actually 'common bear cheese'.— Dan
- I used to believe that french kiss was something coming from France, and that only the French did it— Sasha
- I used to think that you had to be french to really taste french fries.— Not French;)
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj