161 - 180 of 2,027 Bookmarked Items in Ecto-Penis (Undertale)
Navigation
List of Bookmarks
-
Tags
Summary
Your big bony boyfriend arranged for something really special for you. And WHOOO BOY is it a doozy.
Warning:
This jumps right into it without preamble. I actually couldn't think of a good starter for this to ease it into the thick of things. So if you click on this story, be prepared for some hard core skele-smut.-
Bookmark Notes:
Longest porn i ever read
-
-
Tags
Summary
Sans comes home overworked and exhausted again. He's been doing that since they came to the surface and it's beginning to be a problem. Red had enough of that and decides to teach Sans a little lesson.
-
Bookmark Collections:
-
The bar was so low it was practically a tripping hazard in hell, yet here you are, limbo dancing with the devil. by necropathy for altariart
Fandoms: Undertale (Video Game)
18 May 2025
Tags
Summary
“He’s so cute like this,” Killer went on, voice syrup-slow and cruelly fond. “Sleeping so soundly… kneading into your chest like a kitten. While you grind into him like you can’t help yourself.”
Cross’s breath hitched—sharp and sudden, like it had been punched out of him.
There were no words that would come. No defense. It was wrong—the suggestion, the truth of it—but his body betrayed him with every shallow breath, every pulse of heat rolling off his core.
-
Bookmark Tags:
Bookmark Notes:
The bar was so low it was practically a tripping hazard in hell, yet here you are, limbo dancing with the devil. by necropathy
Summary:
“He’s so cute like this,” Killer went on, voice syrup-slow and cruelly fond. “Sleeping so soundly… kneading into your chest like a kitten. While you grind into him like you can’t help yourself.”
Cross’s breath hitched—sharp and sudden, like it had been punched out of him.
There were no words that would come. No defense. It was wrong—the suggestion, the truth of it—but his body betrayed him with every shallow breath, every pulse of heat rolling off his core.
-
Bookmark Collections:
-
-
Tags
Summary
Red's had a long night, and it doesn't help that he went into heat on the day he's supposed to be recording a major dance video.
... Luckily, Blue has a soft spot for pretty dancers and helps him out.
(First chapter is suggestive set up, second is pure porn. 18+ please ^^)
-
Tags
Summary
Honey is a flirt, and has managed to sweet talk more than a few skeletons into his bed in the past. But that was all before he met Wine
A birthday gift for Tomato, Should be 3 parts in total and updated over the next few days <33333
Two peices of awesome Fanart (with some spoilers!) from here! and here!-
Bookmark Tags:
-
Summary
The misadventures of Sans, a vampire, and his thrall(s).
- Words:
- 18,038
- Works:
- 4
- Bookmarks:
- 33
-
Summary
previously named "sans' intimacy kink"
haven for bloodykustard ~
- Words:
- 20,719
- Works:
- 4
- Bookmarks:
- 37
-
Bookmark Notes:
tbr
-
Bookmark Tags:
Bookmark Notes:
3rd installment? theyre so stupid
-
Tags
Summary
Reader dances on the side for a little money.
Red wants to watch dat ass bounce.On his dick *wink*
-
Bookmark Collections:
-
-
Tags
Summary
Kinktober 2025 centered around Jannik Sinner and Carlos Alcaraz
Day 1 - Masturbation
Day 2 - Coming Untouched
Day 3 - Threesome (Clone fucking)
Day 4 - Voyeurism
Day 5 - Dacryphilia (and Cage)
Day 6 - Outdoor sex / Humiliation / Intoxication
Day 7 - Chastity
Day 8 - Webcams
Day 9 - Exhibitionism (and Puppy Play)
Day 10 - Oral Sex
Day 11 - Cum licking
Day 12 - Sissification
Day 13 - Dom!Bottom/Sub!Top
Day 14 - Omegaverse (Alpha/Alpha)
Day 15 - Pollen Sex (Sex Gummies)
Day 16 - Uniform (Firefighter)
Day 19 - Sensory Deprivation (+Wax)
Day 20 - Golden Shower
Day 21 - Monsterfucking (Part 1 of 2)
Day 22 - Monsterfucking and Quiet Sex (Part 2 of 2)
Day 23 - Praise kink and Biting
Day 24 - Gags
Day 25 - Impact Play
Day 17 - Birthday Boy ! (Massage + Surprise)
Day 18 - Size Queen
Day 26 - Lingerie (+T4T) -
Tags
Summary
Horror is starving.
Horror is starving and he won't (can't) eat and all he wants to do is die.
Worried, a bunch of people team up and make a difficult decision in order to help him. There is no telling what this might lead to, but it could have disastrous results-or be what some of them finally needed.Please read the tags!!!
-
Bookmark Collections:
Bookmark Notes:
Low key ate, hoes mightve had all their problems solved with the concept of a breat pump but its fine /silly
The way horror is written is really cool, boarderline feral, the bare least of saniry being the only thing keeping anyone (sans!classic) safe, completly starved from food even after months of not years outside his own AU, and generally just prett angst in desperation
Also cool tidbits im stealing:
- Horror being able to reconise people based on smell
- someone who isn't used to having ecto summoned being unbalanced when they summon for the first time in a while
-
Tags
Summary
This is a Gyftmas fic for the 2023 Gyftmas exchange! The prompt was "Dreammare smut; go wild" XD I got very excited when I found out Dream & Nightmare's birthdays are on the Winter Solstice. I hope my imp (and you) enjoy!
-
Bookmark Tags:
-
Tags
Summary
Dream decides against all logic to go and give a sacrifice to his mother and his childhoods grave, to commemorate the 500 years that have past. This will prove to be a terrible mistake. And what will happen when the other Star Sanses will try to save him?
- Language:
- English
- Words:
- 2,494
- Chapters:
- 1/?
- Collections:
- 1
- Comments:
- 1
- Kudos:
- 31
- Bookmarks:
- 5
- Hits:
- 879
-
Tags
Summary
Your monthly visitor brings some skeletons to the yard.
-
Bookmark Notes:
Ayy found this again, perfectly freaky
-
Tags
Summary
You've inherited a quaint little farmhouse away from busy city life near Mt. Ebott. Could be nice..?
-
Bookmark Notes:
cute porn
-
Tags
Summary
Error lost one fight after another to the Star Sanses. The Universes and code problems kept piling up, and despair drove him to do anything. He tried everything—different strategies, plans, traps, code combinations—but nothing worked, and he remained stuck, with unfinished work and voices behind him.
Until one day, he was embarrassed to discover that suddenly, after so much magic had been spilled by him and his enemies during fights, he could... Invoke a certain, intimate part of the ectobody without their knowledge and influence it as he pleased. Of course, Error was not going to use this! No way! He had principles! Pride, after all!
But... Every day it became more and more difficult, and no other options appeared. And if he could overcome his embarrassment and shame, then maybe it would be worth it?..
-
Bookmark Tags:
Bookmark Collections:
-
-
Tags
Summary
It's no secret Sans loves ketchup. It really was only a matter of time before they used it in the bedroom.
It's consensual food sexy times!
This fic is part of a series, but can be read as a stand alone.
Series
- Part 3 of My own AU (sort of)
-
Tags
Summary
Sans is tired and falls asleep while they have sex.
That's it, that's the whole story!
Series
- Part 2 of My own AU (sort of)
-
Bookmark Tags:
-
Tags
Summary
Papyrus is worried about Sans. While everyone tries to adapt to the surface, he still seems stuck in the past, spending his days at Grillby's instead of going after his passion for science.
When Sans confides to him his desire to reveal everything he's been keeping from him, Papyrus suggests a deal: Sans would tell him one thing per discussions and Papyrus would reward him with a hug.
This is the tale of Sans coming to terms with everything that happened to him and Papyrus being there to support him through the good and the bad.
Series
- Part 1 of My own AU (sort of)
-
"I've found something in your pocket" by Oshann for NotYourMemily
Fandoms: Undertale (Video Game)
07 Dec 2016
Tags
Summary
Sans was out at Grillbys, and you found something in his jacket...
In which Sans and Reader experience long-distance boning.
-
Bookmark Notes:
"I've found something in your pocket"
By Oshannhttps://archiveofourown.org/works/8736562/chapters/20029363
-
Bookmark Collections:
-
-
Tags
Summary
A bad night brings forth a chance encounter.
And that chance encounter promises another shot at finding happiness with someone by your side.