A childhood belief about general

I used to believe that, when I grew up, I would get to be older than my big sister.

This seemed logical at the time, since for every pair of male/female people I knew, the male was the eldest: my dad was older than my mum, my friend Ben was older than his sister, and... well, that was about it, actually. but to my mind, this meant that sooner or later I'd be older than my sister.

Once, when she was picking on me, I told her, "just you wait 'til I'm older than you!". She's still two years older than me, though, so we're still waiting.