Or so he thought, or so she thought, or so THEY thought, whatever the gender, it still has the same meaning: You have just been played like the fool you are.
All is quiet, the shifting in Papyrus's room has settled down. Snores began to sound from the pigsty of a room. Perfect, just what he needed to hear. With a quick movement, San's left eye opens. He chuckles softly, his voice laced with a wanting for one thing, revenge.
Quietly sitting up, Sans got off his bed and headed for his closet. He slowly twists the door knob so it won't make noise. He opens the door, and reaching for the floor, he grabs some rope. He got it from Alphys, who of which gave it to him as remembrance of how he mastered rope knots during training. Call it a sentimental thing.
Sans didn't bother to close the door, even though he could do it without making sounds. Going back over to his bed, he searches for his bandanna, quickly finding it. With the stuff in his right hand, he quietly sneaks out of his room, light on his feet and tip-toeing. He was barely making any sounds at all, which was a good thing. It took a while to get to the room, but it was worth it.
'Dang it, his door is closed, and he'll know if I'll open it, even if he's in the deepest sleep ever! Hmmm... I'll have to try teleportation.' Sans thought. Well, it was a worth a try.
Concentrating super hard, Sans focused on the spot on the other side of the door in his head. When he opened his eyes, he was in Papyrus's room! Sans was so excited, but he had to contain it so he wouldn't wake Papyrus up. Looking over to the sprawled out skeleton, Sans began to wonder how this would work out. He could use his magic, but he's not really all that good, and if he did it normally, it might wake up Papyrus.
Sans took a deep breath, and started to do what he could. Using his magic, Sans carefully shifted Papyrus's arms so they're against the two bed posts. Quietly going over, Sans gently started to tie Papyrus's wrists to the bed posts. Sans then takes his blindfold and quickly, yet swiftly, puts it over Papyrus's eyes as a blindfold. Not only would it help with increasing sensitivity, but it will block Papyrus's magic too!
Going to the end of the bed, Sans, not so discreetly this time, began to tie Papyrus's ankles to the middle head board. Sans lets out a breath of relief. He could NOT believe that he actually did all that without waking up Papyrus. But, as much as he tried to not wake him, it was, believe it or not, time to wake him. Sans jumps up onto the bed and sits on Papyrus's legs.
"Oh Papyyyy~! Wake uuuup~!" Sans said in a soft voice, but it wasn't a whisper. He then reaches over and starts to lightly wiggle his fingers on Papyrus's soles. Sans switched from the left, to the right, in a back and forth manner.
As he awoke from his slumber, Papyrus began to giggle and, on instinct, tried to pull his hands forward. He got confused when he realized he couldn't move... And there was pressure on his legs. It didn't take a rocket scientist to figure out who did this. He tried to use his magic to free himself from the bonds, but he couldn't focus his energy!
"S-Sahahahans! Whahahahat's the meheheheheheaning of this?!" Papyrus questioned, trying to break free from the rope. Sans stopped his light tickling for the moment, and rested his hand on Papyrus's toes. Sans smirked, feeling victorious already.
"Remember when I said "you're so gonna get it"? Well, uhhh, sorry Papy, but you're so gonna get it~." Sans said in a somewhat taunting voice. This confused Papyrus beyond belief.
"I thought you fell asleep? ... You mean to tell me... I've been jinxed?!"
Hearing that made Sans snort. He found it amusing how Papyrus, his older brother, the TALLER one for crying out loud, was actually tricked by him, the smaller and younger one. That had to count as some sort of accomplishment.
"Yep! You have been jinxed by The Mighty Sans!" He announces in a boastful way. Papyrus began to panic a little. He's never felt this helpless, not being able to move, can't use his magic, and is completely blind as a bat.
"Sans... Sans, please, I'm SO sorry. Please let me go!" Papyrus pleaded. Sans giggled, shaking his head.
"Nope~! You brought this upon yourself Papyrus. And now, revenge is mine!"
And with that, Sans moved himself so he could reach Papyrus's armpits. Since Papyrus doesn't wear his hoodie to bed, he's only in a tank-top and shorts. That way, it's much easier. Sans smirked deviously as he reached down and started to wiggle his fingers in Papyrus's armpits. Papyrus struggled to hold back his laughter, squirming a bit.
Sans giggled and full on started tickling Papyrus. He scribbled up and down the pits, going pretty fast. Papyrus let loose his laughter, and his squirming became more vivid. He tried to pull his arms down to block the tickles, but it was no use.
"HAAAHAHAHAHAHAHAHAHAHAHA!! SAHAHAHAHAHAHANNNS, STOHOHOHOHOHOP~!!" Papyrus begged, his voice losing that deep baritone feel to it. Sans smirked, knowing he's not gonna stop soon.
"Stop? But Papyrus, I just started! I don't think I'll be stopping soon." Sans remarked in a slightly sarcastic voice. That only made Papyrus angry, and he tried to summon his magic, but it didn't work because of the blindfold.
Sans moved down to tickle each of Papyrus's ribs. One by one, very slowly, through his shirt. Papyrus pulled and gripped desperately at the rope. How could Sans be so good at that, Papyrus would never know. Maybe Alphys did teach him well.
"Hmmm, let's count these ribs, shall we? Lets see..." Sans began poking and wiggling his fingers on each ribs, counting each one. "One, two, three, four- Dang it Papy! Now I gotta start aaaall over. One, two, three..."
This, despite it not being his worst spot, was driving Papyrus crazy. His laughter echoed through the whole house, and he was pretty sure people outside could hear it. Well, whoever was outside at this ungodly hour. He didn't think he would be this ticklish, but, surprise surprise, he was.
"SAAHAHAHAHAHAHAHAHAHAHAHANNNS!!! CUHUHUHUHUHUHUHUHUT IT OOOUUUUTT!!!" Papyrus howled, wiggling and writhing back and forth as much as the rope allowed. He was so freaking embarrassed! Papyrus hated how he was this ticklish.
"Cut it out? Okay! I'll just move down here!" Sans said, all too innocently. Papyrus knew though that Sans was being anything but innocent. Sans stopped tickling Papyrus's ribs and moved all the way down to his feet.
Sans took a hold of Papyrus's toes and pulled them back. He slowly raked his fingers from the heel all the way up to the bottom of his toes. This drove Papyrus up the wall as well, and Sans couldn't help but chuckle. His laughter was at its highest when the fingers grazed across the middle of his sole. Sans, once again, chuckled.
"Ohh, did I find a weak spot?" Sans stopped tickling for Papyrus to answer. Papyrus began to catch his breath.
"N-No you d-did nOOHOHOHOHOHOHOHOHOHOHOHOT!!!" Papyrus was gonna protest, but his words were cut off when Sans began tickling the middle of his soles again. Papyrus tried his best to thrash around. It made it worse because Papyrus couldn't see where or when he was gonna get tickled.
Sans drew patterns and scribbled all over Papyrus's feet for a good five minutes before letting up on that spot and going back up, giving Papyrus a small break. He flashes an innocent smile, even though Papyrus can't see it.
"So, Papyrus, are you regretting that decision on tickling me?" He asks, his voice as innocent as his smile. Papyrus scoffs and smirks.
"I don't regret it one bit." At those words, Sans shook his head.
"Tch tch tch, well then, I bet you're gonna regret it when I do this." Sans reaches behind him and squeezes Papyrus's knees. At this, he lets out a girly yelp, and mentally slaps himself for sounding as such. San's face grew evil.
"I know where you're most ticklish, Papy~." And with that said, he quickly turns around and starts to attack Papyrus's knees, and the areas around it.
These actions caused Papyrus to SCREAM in laughter. He tries to protest, beg to stop, but it was all too much. He attempts to buck Sans off of him, but Sans was quite the hefty one. Sans giggled at Papyrus's bucking attempts as he reached under and tickled behind the knees. This made Papyrus thrash as much as possible, which wasn't much, considering the way he was tied down.
Sans continued his torturing for another good five minutes before stopping, so he wouldn't kill his brother. Sans got off Papyrus and off the bed, letting Papyrus calm down as he untied his brother and took the blindfold off. Papyrus took in deep breaths, and very quickly, he had calmed down. He almost didn't notice Sans get in bed next to him.
"Heheh... You sure did a number on me, bro." Papyrus pointed out, looking down to his younger brother. Sans looked back up, and he... Actually looked tired.
"Yep, I did... And uhh, I'm pretty tired... I guess those chores can wait." Sans yawns, cuddling up to Papyrus. Papyrus smiles and holds Sans close. He was pretty tired as well. Both of the skeletons close their eyes and fall asleep without another word.
Maybe tickling Sans was a good way to get him to fall asleep, even if it did mean revenge was gonna be a thing.