I used to believe that a couple could mean two or three.
A childhood belief about counting

others believed things like this
- that the word "couple" as in "a couple of items" was synonymous with "several", rather than "just two".— Blair A. Petterson
- I used to think the olden days came once every couple of yearsAnon
- I used to think that when a couple got married and went on their honeymoon, they took a vacation to the moon.— Jen
- I used to think Uncle Ben and Aunt Jemima were a married couple. — l stu electtirc boogaloo
- My little brother once asked my mother when we past a couple of factories.. if the factories made clouds— nicky