The Academy (ch. 2)
By Rochin 30 Mar 2025
As the start of term draws closer and more students arrive, Eron has his first sexual experience with another guy.
Gay Science Fiction Stories
GayDemon's gay porn library: in this story category you can find erotic Sci-Fi stories involving sex in futuristic settings.
Slavery in Albion
By Mattspank 26 Mar 2025
A fantasy about a Great Britain which has legalised slavery for men
Haven P. 1
By ShawnTVWrites 25 Mar 2025
A team from Haven embark on a mission to reclaim earth and rebuild society.
The Driftwalker
By Torsten 24 Mar 2025
The spaceship’s tiny cabin forces intimacy.
Parasite Edging Arena
By PhilipLane 19 Mar 2025
In this TV show, human beings volunteer as a battleground for two unique parasites. One inhabits the testicles, avoiding the host's ejaculation at all costs. The other attaches to the host's penis, trying to enforce orgasm. These parasites engage in a struggle using their human hosts, with only one able to emerge victorious.
Chosen by Aliens
By Staffido 15 Mar 2025
Muscular men were captured by aliens just to be dairy cows
A Soldier's Duty
By B David Ethan 2 Mar 2025
Far in the future, an elite fighting force orbiting Tau Ceti has developed a unique culture centered around masculinity and sodomy. A hung corporal visiting from Earth gets to experience this unique culture first hand--and gets his massive balls drained in some best-in-the-galaxy hole.
Alphas: School for Muscle Men (ch. 2)
By RedJulian 25 Feb 2025
Ricky meets his new master at the school for Alphas.
The Alien Plant
By sweetcum 22 Feb 2025
My car stopped working in the middle of a forest. After getting lost in the woods I encountered a weird plant which had an unsettling plan for me.
The Harvester
By rubber collector 8 Feb 2025
Justin Miller was a sex crave rubberist was seen wearing black rubber outfits all the time Then they arrived on planet earth the sexoids were looking for a human host to serve their purpose
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The Living Rubber Alien Lifeforms
By rubber collector 26 Jan 2025
EVAN Johnson was observing the meteor shower during the night he was wearing his black rubber outfit. He saw that meteor was going to make impact near the lake.
Time Traveler Bob Relives His Past Sexual Experiences
By G-Shock Bobby 25 Jan 2025
Riding his bike in the Mojave Desert, Bob encounters beings not of this world. Bob learns he is both immortal and can travel back in time where it's possible to both relive and alter past sexual experiences.
The living rubber alien lifeforms the rubberlaxins
By rubber collector 23 Jan 2025
Daniel received a package from a mystery person when he opened it inside was a black rubbery outfit. But the black rubber substance it is made of is not of this planet
Slavery is future: 2050
By Sadist Daddy 3 Jan 2025
Alot charged till 2050, the earth is in natural crisis and only man are left on earth, it all happened because of climate change. Read to know how compulsory slavery saved earth
Aliens Having Sex With Men-First Encounter
By Del Crane 2 Jan 2025
Alien Men Develop a Taste for Human Cum.
Cerule (ch. 10)
By Draven Moorcock 15 Dec 2024
As they sail under enemy fire, Jake, known on Cerule as Par, takes command and guides the small crew of the ship Skylark through peril toward safety.
It's 2044 - Most Gays Have Three Partners
By Del Crane 9 Dec 2024
So three Big Cocks to Suck and get Fucked By
Whats' To Cum - Haven
By ShawnTVWrites 6 Dec 2024
Haven, is a post-apocalyptic, sci-fi, story I've been working on. This is just a sample from Chapter 1. It'll be debuting soon. It is heavily inspired by The 100, Stargate, and other "Let's rebuild society" films, tv shows, and books. I hope you enjoy this snippet and look forward to reading it as much as I've enjoyed coming up with the story and
A Final Orgasm by Dr. Phallus
By Del Crane 2 Dec 2024
To Survive, The Human Race Needed Cock Suckers.
Dave Dickinson - Semenologist
By Del Crane 27 Nov 2024
I work for an obscure government agency-the Semenological Survey. Healthy male cocks means a healthy country-your taxes at work.
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The Rubberist Cult of The Vorlocks
By rubber collector 27 Nov 2024
Dennis moves into the town of ROCK Creek. He discovers an old friend who shares a secret that both have. His friend introduces him to the rubberist cult but what his friend doesn't know that Dennis is the new rubberist cult leader.
Brad - The Greatest Fucker
By Del Crane 16 Nov 2024
He Fucks like a Pro.. and he's a robot.
Invention of Insatiable Desires: A Dr Stanford Story (ch. 5)
By Maxim R. Mayerling 16 Nov 2024
A couple of months after their transformation, Eric and Jim are back to talk to Dr Stanford, he's happy with their progress and invites them to customise their bodies for their own desires which the pair agree.
Cock Sucker in Outer Space
By Del Crane 15 Nov 2024
Sucking Cock In Outer Space
Cave Men - Where Gay Sex Started
By Del Crane 14 Nov 2024
It's another early morning, 2040, Professor Phallus holds a sex lecture.
The Robo-Lips Sex Machine
By Del Crane 10 Nov 2024
Best New Product-2030, the Robo-Lips Sex Machine for a Horny Cock.
Professor Phallus' 2040 Gay Sex tube lecture
By Del Crane 27 Oct 2024
Let's take a closer at the Male Sex machine
Billy And The Sex Clones (ch. 2)
By Del Crane 26 Oct 2024
About once a week one of the Clones would wander in at night, after a piss break, and in the dark, fuck any mouth that presented itself. Joe and Jim, one after another would get both their mouths fucked by a thick rock-hard Clone cock-and get a load of narcotic Cum
The Night Feeders
By rubber collector 26 Oct 2024
Alien creatures called the sucklvors land on planet earth in order to fulfill their mission they took on the form of young boys. So they can make friends with the young boys in the town. But they had a secret agenda.
The Harvesters
By rubber collector 25 Oct 2024
A mysterious stranger wearing black rubbery outfit convinces the mayor to create a group of young men into the Aquanauts but the mysterious stranger has an evil purpose set in place as he is not human
About our gay science fiction stories
As an online source of gay erotica since 1999, GayDemon Story Library is your ultimate destination for the best adult science fiction with sexy gay guys and aliens you can enjoy for free. The vast collection of gay sex stories we host here has something for everyone who likes reading about a future where humans and species from other galaxies experience different types of sex. Download for free any short story or porn novel you like. Authors upload their stories in this section, so we ask you to respect their copyright. If it happens that you want to post a story you don't own the copyright for, do so only if you have the permission given by the author. To show your appreciation for writers and their hard work, don't forget to leave a vote and comment.