I used to think that college could be referred to as retirement school since kids over 16 leave school in the same way that older people leave work.
A childhood belief about getting older

others believed things like this
- My niece used to believe that I lived in the sky because she always saw me leave for school on an airplane.Anon
- When I was a child, I used to believe that teachers never leave school and slept in the chairs.— Majo
- I believed that our teachers lived at school. They were teachers--they had no reason to leave :)(Anon
- I used to believe that you got married right after you finished high school or college. Anon
- I thought that wars had to last four years... just like high school and college.— A. Falk
- i used to believe that if i didn't work at school, i would have donkey ears, so now i work hard !!!— denis