The Sexual Taxonomy of the Species commonly known as Xenomorphs
Xenomorphs are an all-males species, with reproduction achieved either through anal breeding, during the course of which seed will pushed through a cervix located in the xenomorph's rectum and into their womb, which will then results in a pregnancy and live
Goblin Rape(AI created)
Goblins are an all-male species that capture females of other species and use them to breed.
Kaa Mowgli Treetop Encounter
The closest thing that he had seen to another human had been mancubs; an all male species related to humans but not humans themselves. mowgli already acted like a true mancub and would fit right in. bagheera thought about it for a moment.
A Hero's Anguish
Or were they were an all-male species? but if that were the case, how would they procreate? to his disquiet, link found himself in a situation he did not know how to deal with at all.
Discharged - Coevolution 015
"i'm a walking hate crime target for being queer and part of an all-male species. and i don't regret calling your ex..." she stopped herself. "sorry, i shouldn't--i don't wanna pick at fresh wounds--literally, i guess," she laughed nervously.
Netherhiem 01
They are an all male species. that's right, not a single female was born in the netherbeastian ranks. how they get kids? simple...the males have the ability to carry and give birth to the new generation of netherbeasts.
A cruel Demoness, her slave, & a relationship of hate.
Being that they're an all male species was her only giveaway. but that didn't matter.
Breeder Nimh
Pokémon sawk, one of the desired 'mon for ivan's mid-tier team, and she managed to find several just before their vacation, however due to being on vacation, she couldn't vet any of them until she got back, which she knew would be a tough job with an all-male species
CM:3 Of Life And Tech
An odd all male species that couldn't reproduce on their own so they would bring female furs to their nest. there the alpha rat would take them into a harem where he would keep them knocked up.
Out of This World
I kinda suspect that they're an all-male species, or something similar, since they thought that you and i could engage in reproductive activities. but that's impossible.
Kaa on the Hunt Chapter 2
Mancubs were an all male species that reproduced solely through the plants that would take their sperm and by mixing it together would make more mancubs.
TF 1000
Jenny's bite wound had healed itself, and the moment the sun had set, kyle had watched in horror as she was transformed into a nidorino hybrid - an all-male species.