Eggs come out of a cloaca, which is the bird's orifice for everything that comes out and goes in the rear parts, so yes, in a sense, eggs come out the butt. I don't think that can be reasonably extrapolated to humans or humanoids, but reason may have nothing to do with an MPREG story.

MPREG always makes me think of that one storyline in the Constantine comics. Eww.

I wasn't thinking about bird eggs. I wanted to know about MPREG eggs. Where do they tend to come out of, in general MPREG terms? Caesarian? Butt birth? Would a guy need a childbearing ass in order to lay one?

For anyone who reads wincest, and happened to read all the way through the horrifically bad Stranger in Love, wtf happened? I began skimming early on due to the weird scenes (a waitress scolds the boys for not ordering coffee, insisting that it's policy that they do so before anything else, and it isn't received by them as freaky and needing to exorcise her or flee) and increasingly-hard-to-parse sentences. After the incredibly long nonsense about mutli-dimensional portals to other universes and "guides" that ends up being resolved with salt-laced varnish, it turned out to be a case of shapeshifters. And the prologue and epilogue confounded me. I just . . . usually when a fic is bad I just dismiss it, but this one is bugging me, lingering. It was like it was written by an ESL dementia patient.

Lo mein: maybe the unfortunate butt-bearing boys have tiny skinny babies that don't impact their (Sam Winchester's) lovely skinny hips.

Most of the mpreg I've read, there's a Caesarian involved. Once there were eggs involved, but the babies did turn out to be ducklings, to everyone's dismay. (Stargate Atlantis lends itself to weird technology doing weird thing.)

What little mpreg I've run into (like, four fics) two were angelic births that were spiritual/metaphysical and didn't involve actual physical birth, even if the end product was physical non-vessel-having. The other two the writers skipped right over the physical act of birth. Sex, then babies.

Well, I figure Supernatural fandom will either go egg, or go grace. How are you gonna know?

If Cas is Mr. Mom, then yeah, egg or grace, because angels have wings, and therefore are the ancestors of birds (and dinosuars, I guess). But the other half of Supernatural fandom is wincest, and so those two options are mostly out.

I think that there needs to be an additional orifice. An egg coming out covered in feces is one thing, the important part is protected from contamination. But a mammalian infant coming out the craphole, during a delivery that could take hours, is just wrong.

Oh, the hurdles writers will jump through or simply dodge so that they can keep the buttsex and have babbies too is incredible.

In the Avengers fandom there's some mythological canon for MPREG. The writers either gloss right over Loki's birthing the offspring, bring up shape shifting, or go the "Alien, alien, totally an alien," route. In one story he was like an ant queen, popping out eggs all over the place.

I don't recall any commentary on the baby-worthiness of Loki's ass. If he's birthing foals, one would hope it's more capacious than average.

So MPREG babies don't usually come out of the ass? I'd just heard the term butt babies and run with it. That's so judgmental of me. I should be ashamed.

However, I think you were just telling me about Wincest MPREG, and I really--just tell me about full on bestiality MPREG, because at this point WHAT THE EVERLOVING I DONT READ THAT.