My husband of 25 years believed that if a man and woman saw each other naked they HAD to have sex. I think he still believes it.
A childhood belief about sex

others believed things like this
- I used to believe once a man and a woman lay naked caressing each other, the woman would be pregant— oiman
- 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 jaywalking meant walking around naked in public (from naked as a JAY bird...)— Izzi
- Well I once believed that when someone was home alone, they'd walk around naked..Anon
- my husband believed, until recently, that the word "several" meant seven of something. — sheryl
- When I was little, I believed that a girl could get pregnant by loving her husband and kissing him.— Ryne