I have a painfully vague memory of being 14, and my older sister and brother being 16-18. My dad was talking about the Virgin Mary and explained to us that a virgin was "A girl who wasn't married".
Thank god for then internet.
A childhood belief about virginity

others believed things like this
- i used to think a virgin was a type of nun because of the 'Virgin Mary' being religous!!!Anon
- I used to think virgin mary was actually 'virginia mary'Anon
- I thought "Virgin Mary" was actually "Verge 'n Mary" and that Verge was a nickname for Joseph. — Rachel
- I thought the Holy Ghost was the ghost of the Virgin Mary.— Texas granny
- When a "mean girl" in early grade school asked me if I was a virgin I answered "no I am catholic."— Hilary
- i used to think that every family had a brother and sister and they married eachother when they got olderAnon