My mom was an obstetrician, and I got into her books on labour and birth, so I figured I knew what's what. So a kid on the playground asked me a question about sex, and it started "When a man fucks a woman..."
I didn't have the faintest idea what he meant or how it was relevant to babies; at that point, I thought "to fuck" meant "to beat up"... because you tell someone "fuck you," right?
A childhood belief about swearing

others believed things like this
- I thought it was "fuck-an-egg" until I was 16.Anon
- When I was thirteen, I thought that FTW stood for Fuck The World.Anon
- When I was younger, I thought that Labour Day was when all sorts of women gave birth.— Greg
- As a kid, I thought "No Outlet" signs meant the houses past that point didn't have any electrical outlets.— Julie
- I used to believe that the term "being mugged" meant someone beat someone else with a coffee mug.— Matt Thiel
- I used to beleive that if you point at a graveyard, it would point back!!(whatever that meant)— scary ashley