When I was little, my Dad always used to start stories with "When I was a little girl" so I always believed (I am female) that when I grew up I would become a man and my brother would become a woman.
A childhood belief about getting older

others believed things like this
- I thought that when I grew up I HAD to start wearing polyester like my mom.— levi lady
- When I was a little girl I used to believe that when I grew up I'd turn into a man.— Jessica
- when asked what i would like to be when i grew up, as a girl of about 5, i answered "a horsey".Anon
- My dream was to be a dad when I grew up, which would provew to be difficult seeing as i am a girl.Anon
- When i was younger i thougth that when you grew up you could decide whether you wanted to be a girl or a boy. Anon
- I believed that all cats were female and all dogs were male. — Biologically confused