When I was three or four I believed that letters and numbers were either boys or girls. The letters A, B, H, K, M, N, P, Q, R, U, V, W, and Y are girl letters whereas C, D, E, F, G, I, J, L, O, S, T, and Z were boy letters. X always kind of tricked me (ironic considering our chromosomes). 1, 2, 3, 5, and 7 are boys and 4, 6, 8, and 9 are girls. I can remember to this day (20 years later!) exactly what letters and numbers are the girls and which ones are the boys!
A childhood belief about spelling

others believed things like this
- I used to believe that numbers had gender, that the odd numbers were boys and even numbers were girls. — Evelyn
- When I was a little girl, I believed that all cats were girls and all dogs were boys. :)— Mary Ellen
- I used to think "Zed" and "Zee" were two different letters.Anon
- I thought that the difference between girls and boys was that girls have teeth.
Anon - From the first six letters of this word, I thought that “megalomania” had something to do with megalodons.— Enrico
- When I was little, I believed that all cats were girls and all dogs were boys. Go figure!— Laurie W.