I am an older sister and took great pleasure teasing my younger sister. I told her you had to be 16 before you could be sarcastic (a bit like buying alcohol). She reached 16 and asked if she was old enough yet. I said she had to wait until she was 18 and she very nearly did - Sorry sis.
A childhood belief about speaking

others believed things like this
- My older sister told me squirrels were poisonous, and I believed her until I was 9.— Jenni
- I used to believe that cows mooed out of their ears-because my older sister told me they did.— ella
- I used to belief sloths lived in trees outside my childhood home. My older sister told me so.Anon
- a friend of my little sister's had 4 older brothers, so she thought that when you got older you grew a penis!Anon
- when i was really young, i couldn't figure out why i can't get older than my older sister.— angela
- My 6 years younger sister used to tell me that I was younger than her. She was just growing backwards.— Taryn