Just because, I started thinking about songs that feature a couple where both people are named. But both members of the couple have to have names stated in the lyrics, not implied that one is the singer. In other words, Me and Bobby McGee does not count.
Hmmm, if couples named in a “dialogue” song count (i.e., a duet where each singer mentions the other by name rather than both members of the couple being named by a narrator who isn’t either of them), then there are parody versions of “Daisy Bell” (aka “Daisy, Daisy” and “Bicycle Built for Two”) that qualify, because they include a verse with Daisy addressing her suitor Michael.
As the OP, I’ll allow it. My only stipulation is that both names are mentioned in the lyrics, and the singer can be one of the couple or the narrator, or both in the case of Taxi by Harry Chapin
“She said how are you Harry?
I said how are you Sue?
Through the too many miles
and too little smiles
I still, remember you”
The Ballad (Denny & Jean) by Todd Rundgren, which remains, to this day, the saddest song I’ve ever heard in my life. It’s odd, because the lyrics are so totally simplistic, they’re like sixth-grade level poetry, but Todd sings them with such authority and finality. The chords contribute to it too. Billy Joel, with all his detailed world-building and stage-setting in Italian Restaurant, still can’t make Brenda and Eddie anything more than an abstraction in comparison to Todd’s doomed couple.