I used to believe that a Lesbian referred to someone who was either of Lebanese nationality or from somewhere else (perhaps a country called Lesbia?).
A childhood belief about marriage

others believed things like this
- My brother once referred to the neighbor as a lesbian (she was Lebanese...)Anon
- I used to think the Black Country region in the UK was called that because everyone lived in darkness there.— K
- Until about age 9, I thought there was a country called "Operaland" where everyone sang instead of talking.Anon
- I used to think wars started when a sergeant from one country socked a sergeant from another country.— recovering
- Until I was about 11 or 12 I thought that "prostitute" referred to a female criminal.Anon
- I used to believe that the phrase "Mamma Mia" referred to a girl named Mia.Anon