When I was a kid, the AIDS epidemic was in full swing. There was a big push in the media to "have safe sex" and "always wear rubbers." For a long time I pictured people rolling around in full rubber haz-mat suits.
A childhood belief about condoms

others believed things like this
- I used to believe that the sky was full of dead people and I would see them if I went high enough— Maria
- Before I went to a planetarium for the first time, I thought it was just a room full of plants. Anon
- I thought bathing suits were called "baby suits".— Katie
- I used to think that swing music was called that because you listened to it when playing on the swing set.Anon
- I thought if someone worked full time it meant they worked 24/7 and never did anything else!— andalite
- The moon is full of wotsits.Anon