I used to believe that when I got to a certain age, my older brother would 'turn small' and I would be able to be the older sibling. I believed that this cycle would last forever.
A childhood belief about getting older

others believed things like this
- When I was very small. by older brother told me that if I "Kissed my own elbow, I would turn into a boy."Anon
- My brother told me that I would turn into a boy when I got older. It made me cry.— Sarah
- My older brother told me that everytime you sneezed your lungs would bleed. I believed this until I was 21!— Gem
- I thought that when I got older "they" would invent a cure for death and I could live forever.— wishful thinking
- when i was little i thought my cat would turn into a lion when he got older.Anon
- That you had to marry your sibling. During this period of time I devoliped a crush on my brother.— don't worry I'm a girl