I think of myself as being pretty firmly in the camp that the Jade reveal we're talking about could have been handled better, but following dreamingdead's own logic about babies and bathwater I don't think that means THERE'S NO WORLD WHERE THIS IS AN APPROPRIATE DEVELOPMENT, EVER. it's just a matter of tact and approach. (speaking of middlegrounds.)
i've been thinking about this lately and i honestly do not think, as a concept, it's such a crazy followup to something that was already in the comic: John and Jade's "GHOST BUTT" conversation (p. 5295). the conversation never goes anywhere explicit with it, but John's hand gesture makes it clear what he's thinking, and Jade's discomfort with the whole topic shows that the story is cognisant of the subtleties of sexually maturing as a half-human half-ghost thing. combined with other stuff, like John's comment that Jade is "not really the weird kind [of furry] that people on the internet like to have sex with in their imagination" (p. 4338), it's not hard to frame this as a sensible avenue through which to explore Jade's emergence into adulthood. I just wish it didn't come with what felt like a lot of bashing Jade as a character, particularly in a way that paints her as an annoying bitch for getting in the way of the Really Important Parts of the story (i.e. Davekat yaoi)
>eats somewhere other than olive garden once
>fucking dies