oh, i found one, when i was a baby and was learning to write(not at school) i used to write E backwards, with the "legs" facing left and not right. and i was convinced that the right amount of "legs" was 4, it was allowed to put more than that, but not less, so 3 was wrong, and 4 was perfect, it gave the right importance to the E.
i recently found out that someone else had a theory about the E similar to mine.