No one told me, but I assumed that when a woman was pregnant, she had to spend the whole nine months in the hospital. I freaked out when my parents asked me if I wanted a sibling, not wishing to part with my mother for so long. I didn't tell them why I was so upset, otherwise they could have set me straight. I'm an only child :)
A childhood belief about reproduction

others believed things like this
- I thought that my parents chose my cousins, and was upset when my mother wouldn't let me add one.Anon
- I thought that a woman got pregnant kind of like catching a cold, by being around her husband for a long time.— No Name
- I used to believe that after 9 months, mothers went to the hospital to buy a baby off the doctors.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
- When I was a child, I used to know that using cheques you could spend an endless amount of money— lollo
- I used to think once you got pregnant, you couldn't have sex at all during the 9 months.Anon