When I was little, my older siblings went to mixers. Mixers were when all the Catholic grade schools went into a gym and "mixed". I never asked what mixers were because I didn't want to be stupid.
So, up until I actually went to one, I believed mixers were evening cooking classes.
A childhood belief about classes

others believed things like this
- When a "mean girl" in early grade school asked me if I was a virgin I answered "no I am catholic."— Hilary
- When my dad was little his older siblings convinced him that there were flocks of flying turtles.— Anonymous
- My siblings told me that if I ate too much cheese, I'd turn into a cow. I believed them.— Sophie
- I totally believed my siblings when they told me the family was aliens and had a space ship in the garage.— cully
- I thought my grandad would get older, so I asked him 'What do you want to be when you're older?'.— Afterlife Dreamin'
- I thought the tip jar at the restaurant was so people could give the chef cooking tips for how to cook better.Anon