I believed that a couple meant a "cup full" instead of two.
Later I thought that a few meant 3 or 4 and several meant 7.
A childhood belief about counting

others believed things like this
- i used to believe that sex meant love and that having sex meant the two people would live happily ever after.— amy
- I used to believe that "gluten free" meant you could eat as much as you wanted without getting full or fat— Jess
- I thought if someone worked full time it meant they worked 24/7 and never did anything else!— andalite
- my mom believed when she was little that a street sign that said don't walk meant you better run.— Sara Mclen
- my husband believed, until recently, that the word "several" meant seven of something. — sheryl
- I fully believed, up until about 6 years old, that the word 'accident' was a noun that meant 'burnt toast'.— Karl Goetz