When I was in elementary school, someone told me that for a woman to get pregnant the man had to pee in the woman's mouth and she would become pregnant. I now realize that kid was extrememly misinformed on oral sex and conception, but at the time I believed it wholeheartedly.
A childhood belief about getting pregnant

others believed things like this
- I thought that a woman got pregnant kind of like catching a cold, by being around her husband for a long time.— No Name
- When I was little I used to think that as soon as you were married the woman automatically got pregnant.Anon
- Whwn I was like 8 I used to believe woman just got pregnant randomly. Anon
- 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 believe that when a woman was pregnant the baby could play monkey bars on her ribs.— Laura
- I used to believe that when a woman was pregnant, she fed the baby with a tiny spoon through her belly button.— Marie