I hate to admit, but I still have those kinds of moments in my 30's!! The other day, I was thinking (way too hard, obviously) about the show "The Dukes of Hazzard". I realized that there were at least 5 cousins (remember the season when 2 cousins replaced Bo and Luke?) living with their uncle. That means that Uncle Jessee had at least 5 brothers (the kids all had the last name of Duke) and each had a child. Ok, not that unusual. But why were they living with the ONE brother that apparently didn't have ANY kids??
Some of my other childhood misconceptions probably stemmed from watching the Dukes, too. And hanging around with neighborhood boys who watched the Dukes.