I understood quite well how babies were made, with the sperm coming out of the man's penis and fertilizing the "little seed" inside the woman. What I could not understand, though, was how the sperm could go through the man's pyjamas. I think I wondered about this until I was at least 12 years old. Nobody ever slept naked in our house, so it never occured to me that you could take off your pyjamas.
A childhood belief about reproduction

others believed things like this
- I used to believe that my choice of pyjamas to wear would determine the following day's weather.— Pyjaman
- I used to think people on the telly could see me. I hated getting my pyjamas on in front of Gordon Honeycomb.— Michelle James
- I thought sperm were fish and when I got a goldfish I went around telling everyone i had a sperm— Kara
- I used to believe that a baby's sex was determined by whether the sperm had a picture of a man or woman on it.— David E.
- I use to believe that the man peed in the woman to get her pregnant. Didn't know about sperm until sex ed. — das
- I used to think sperm was invisible.Anon