I used to believe that the phrase "Indian Summer" referred to some sub-continental practice of gift giving. Like they give you a gift that you keep for a while and give back.
I only recently (like past 3 years) realized that the Indian referred to was the american Indian and the people taking the gift back were the Whites - ie Oklahoma!
A childhood belief about speaking

others believed things like this
- I thought that Indian Summer was like the weather in India.Anon
- I used to believe that the red dot on Indian people's foreheads meant that they had psychic powers.— Mark
- I used to think Indian women had scabs on their foreheads, but it was bindi!— Emily
- My dad told me when I was little that my belly button was "Where the Indian shot me"Anon
- I used to believe that those of Indian descent who had them were born with dots on their forehead.Anon
- I used to look for an Indian along the roadside because of signs that stated
"watch for fallen rock"— pam petry