A childhood belief about family

I believed that grown-up men were automatically older than grown-up women (i.e., Dad was automatically older than Mom), and a taller grown-up was older than a shorter grown-up. Luckily, my Mom was shorter than, and younger than my Dad, so no cause for utter confusion. I also thought that grown-ups who played on the floor with kids (my Aunt) were younger than those who were too busy to (my Mom). In fact, my Aunt is 10 years older than my Mom.