A friend pointed me here, as I'd asked people to explain to me why they ship ZukaFuji. I understand a bit better now - thank you for your awesome essay! ^_^

One thing, though - in the TenuPuri family chibi episode, it's said that Tezuka is Inui's father and Fuji is Ooishi's mother, so they're not actually married, they just live under the same roof! ^^;