In junior high our sex ed teacher told us that sperm could crawl up our legs and still get us pregnant, so we had to make sure to keep our clothes on, whatever the boy was doing with his "thing".
A childhood belief about reproduction

others believed things like this
- Until junior high school, I thought Monty Python was a wrestler.— Jamie
- I use to believe that the man peed in the woman to get her pregnant. Didn't know about sperm until sex ed. — das
- a friend of mine thought that you could get pregnant by swallowing sperm. Ha!Anon
- i used to believe that condoms were thing that u put in your mouth and they would melt and kill all the spermAnon
- I thought sperm were fish and when I got a goldfish I went around telling everyone i had a sperm— Kara
- My teacher held out a hand to say, "stop" but I thought she wanted a high-five.Anon