Well it's not like there is a solid canon about reproduction, we only know there are 2 ways, yet, it's "how to get each way?" where opinions diverse and canon isn't solid.
You may agree or not cokerpilot, but, well, it's not like we have a defined canon here to mention fallacies or not, as i mentioned in a previous comment, there is a theory that mentions "non inside mamumamu" contact with the fluids may lead to stalk reproduction...
Yes but on rub-rub reproduction the theory I support is that the yukkuri secrete fluids to weaken the outer layer of skin and allow the sperm paste to enter into mother. I guess that because it's a ko it's outer skin might not be as strong as an older yukkuri so could explain it that way.
Edit: I also support Penpi penpi Mamumamu as well.
but yes after rereading your post and feeling a bit dense for misunderstanding the first time. Your right there is no solidified cannon on this subject.
I'm still gonna point at post #12026 every time the location idea of determining births is mentioned, since the existence of an extract that can cause mammalian pregnancies kind of does poo-poo all over the idea.
This series fucking rocks. Not only the "feeding yukkuri yukkuri raises birthrate", but stucking ko into mother's ass made it horny and caused peni-peni orgasm that made ko pregnant. Also the art style was really good. I guess author took vacation seeing there are no more pages.