My little sister argued with me when she was about 14/15 that "floor play" was what people did before moving to the bed.
A childhood belief about sex

others believed things like this
- When I was about 4 and I saw the clouds moving sideways, I thought that Earth was moving closer to the Sun— Helen
- When I was a little girl, I used to believe that there were little people behind on TV moving all the time — Tayde
- I used to believe that when I saw the clouds moving in the sky, that it was actually the earth moving. — Megan Gilbert
- When I was 5, I argued with a friend because I thought I never have been 3 years oldAnon
- I used to believe that the people that worked in stores slept right there on the floor and lived there. Anon
- I used to believe that boarding school was where people went to play board games.Anon