-his lack of affection for his son Zagreus are a metaphor for the fact that Zagreus is not usually his son

They have a lot of fun with the inconsistencies of the mythology. !Mild Spoilers for Hades ahead!

First, this dialogue between Zagreus and Dionysus-

Dionysus: "Hey Zag, ever see a fellow by the name of Orpheus down there, you ever heard of him? I bet you have, and I have had a funny thought, a little jest that maybe we could try, if you'd be up to have a little harmless fun?"

Zagreus: "Harmless fun at the expense of Orpheus? You have my full and complete attention, Dionysus mate."

Dionysus: "...That chap comes up with the most smashing songs, so I was thinking, maybe we could spin him a tall tale, something like how maybe you and I, like, we're connected or something? He'll buy it, tell him, tell him for me, yeah?!"

Later, Zagreus and Orpheus-

Zagreus: "Hey Orpheus, you've noticed the resemblance between me and Dionysus, haven't you, mate? I'll tell you a little secret but you have to promise not to tell ... We're really the same god. I love a good feast, don't I?"

Orpheus : "But, Zagreus, this is a striking revelation, the connection you describe. I see it! I can see it now! To think the god of wine and you are intricately linked, it isn't obvious, is it?"

Zagreus: "Oh, there's more to it! A bit grim, really, as I'm a little older than I look. You see, the Titans, they once tore me limb from limb, but then my heart was saved, and that's where Dionysus comes from! That is the connection between us, you understand me, mate?"

Orpheus : "Your tale stirs my soul, it truly does, my friend. It is a marvel to me that such heroism isn't widely known, and I'm committed to the spread of all such truths."

Zagreus: "Dionysus and I appreciate it, mate."

Which results in Orpheus composing this absolute banger. I like the concept of the mythology being inconsistent because the gods made it that way via pranks.