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Talk to the methane-breathers." "that explains how i didn't know," fritz replied with a shudder. methane-breathers were weird. really weird.

Clean, Dark, Goat, Horror, Hyena, Opera, Space, Unicorn, Violence (Not In Yiff), Weasel, artificial intelligence, dove

Rise of the Xenomorphs: The Future Breed, Chapter 1

He smiled and they smiled back, taking their rifles and connecting a methane cartridge to the underbarrel flamethrower attachment.

Alien, Fighting, Human, No-Yiff, Violence (Not In Yiff)

How to Raise a Dragon (Part 1)

Wilker knew if he slept in his room, he'd surely dehydrate from the hot farts or suffocate on the hydrogen-sulfide and methane. he only had one option left. "i'm sleeping on the couch..."

Babyfur, Comedy, Diapers, Dragon, Fart, Flatulence, Humor, Wolf

Don't Picnic In Cow Pastures (Part 1)

She unleashes another eyewatering outburst of methane-laden manure gas, and from deep in her bowels there's a much wetter gurgle, a worrying harbinger that another diarrheal detonation is nigh.

Bestiality, Brown shower, Cow, Diarrhea, Dominant feral, Dubcon, Farting, Femdom, Feral, Human, Human on Feral, Hyperpiss, Hyperscat, Masturbation, Mf, Poop, Scat, Talking Feral, Watersports, manure

Fox Furnace

Fox furnace by otteronymous the pungent smell of methane wafted across anna's nostrils as she pushed the food cart out of the basement elevator.

Arctic Fox, Belching, Domination/Submission, Farting, Fat, Femdom, Force feeding, Humilation, Siberian Husky, Slob, Submission, Weight Gain, burping, gas

MAD

So long as there is no significant weather churning the air and mixing the methane and ammonia down to the surface, the air is quite breathable.

Anal, Anthro, Character Development, Gay, Human, Love, M/M, Oral, Plot Development, Rimming, Science Fiction, Story Series, Tiger

Frontier's Embrace - Part 2

In the space between the stones, the liquid methane seemed to be sinking and rushing away as if the bottom of the lake had split open.

Cum, Cumshot, Fox, Frottage, Gay, M/M, Sci-Fi, Science Fiction, Space, Wolf, frot, zero gravity

A Lykan 2

"that address was in the methane section of the station. i don't breathe methane, but i don't know if you--" "this outfit is vactight. a methane gmask will be enough.

Action, Crime Drama, Insect, Other, Political, Sci-Fi, Science, Violence (Not In Yiff), Wolf

Concurrence: Chapter 2

“gods," she said in disbelief, plucking one of her unggoy to its feet when he couldn't roll off his methane tank. “why did they do that? we had hundreds of troops stationed right below the carrier!"

Action, Alien, Aliens, Brutes, Covenant, Elite, Female, Female perspective, Friendship, Future, Gun, Halo, Human, Interspecies, Love, M/F, Male, Male perspective, Mandibles, New Mombasa, ONI Operative, Romance, Space, Unggoy, kig-yar, odst, sangheili

Pond Scum 2

A thick cloud of methane wafted up from the shit, filling the stall. max turned, admiring his work. the toilet bowl was full of shit to the brim, the brown slop the consistency of a frothy pudding.

Bathroom, Breathplay, Classroom, Facial Hair, Fart, Filth, Goo, Grunge, Highschool, Hyena, M/M, Mask, Piss, Poop, Possum, Rat, Scat, Skunk, Slime, Smoking, Toilet, Transformation, Watersports, control, dirty, methane, motorcycle, pouch, shit, sick, stench, stinky, sweaty, urine

Sarabi's Revenge BUTT REALISTIC

And without further delay, he inserts his rotten, bloated, methane filled dick on her tumorous, abcessful arse.

Anal, Female, Female/Female, Female/Male, Male, Male/Male, The lion king, Vaginal, fanfic

A Tale of Woe

There were huge quantities of methane and ammonia available in the comet belt near the outer part of your planetary system.

Plot Development, Science Fiction