I used to belive that you couldn't get married to someone you knew, because cousins and siblings couldn't marry, and the groom couldn't see the bride before the wedding.
A childhood belief about marriage

others believed things like this
- I used to believe that you couldn't marry people with different eye colors as you.Anon
- At a young age I couldn't imagine how people without glasses could marry the ones wearing them. — Ana
- When I was a year old, I believed if I hid my face, my mother couldn't see me because I couldn't see her.— kimberly dianne(:
- I can remember thinking that is I hid my eyes, and couldn't see anybody that they couldn't see me.Anon
- I used to belive you couldn't stop growing until you were bigger than godzillaAnon
- I used to believe you had to marry your siblings when you grew up.— Cade Whitbourn