Sans was sitting on a stool in Grillby's. He was starting to fall asleep when Frisk slammed the door open unceremoniously and walked over to him, shutting it back after entrance. Sans stares at Frisk with wide eyes as the determined human looked at all the windows so make sure nobody could see what was happening inside, closing any open blinds and locking the door. "Hello Sans. I have some information with which I would like to share with you."

"Uh… What is this info?"

"Chara recently informed me of a certain… Thing that people do when they show affection for each other. And I cannot talk about it with any of these monsters around." Frisk grabbed Sans by the arm, dragging him to the door which she unlocked and opened.

"Follow me."

"That's pretty much the only thing i can do right now, so sure…"

Frisk led Sans into the Skeleton Brothers' house and up to his room, locking every door as she went by.

"Why are you locking all the doors?"

"I'd rather talk to you in a private setting."

Sans yanked his hand out of Frisk's grip as she led them both into his room and locked the door behind them.

"Just tell me what this is about."

"Alright. I'm actually going to show you."

Frisk sat Sans on the bed.

"Uh… Okay? What did you want to show me?"

Frisk hesitated, thinking about a lot of things. Oh my GOSH, what if he doesn't like it?! What am I supposed to do then?! She blushed furiously, finally poking Sans's pants in the area between his legs. Sans blushed as well, pulling his hood over his eyes and shaking. I know what she wants… Do I let her have it?!

After a few moments, Sans calmed down and sighed. He looked up at Frisk and nodded, pulling his pants down partially. He covered the place where anything that most kids would consider gross, and when he uncovered it, there was something there. It was bright blue. Frisk blushed even worse at this. oH MY GOSH OH MY GOSH IT'S HAPPENING-

Frisk bent down at Sans's knees, her heart racing. She then grabbed the thing and started rubbing it, causing Sans to shudder a little. At this, Frisk glanced up at Sans.

"Would you consider doing this at a different time?"

"Yes please, this is uncomfortable."

Frisk nodded and stopped rubbing it. Sans let out a small sigh of relief, too soon as Frisk suddenly put her mouth on the tip of the thing. Sans instantly shuddered more than before. She started sucking on it, causing his frown to turn into a small, pleasured smile.

"UgH- Frisk nO-"

Frisk was still blushing like crazy, but also seemed to be having fun. She resumed rubbing it while continuing to suck for a few minutes, before Sans said something.

"Frisk, i thINK- hng that's enouGh…"

Frisk didn't listen. She had stopped rubbing it but now had the whole thing in her mouth, sucking on it like a kid would suck on a lollipop. Sans could barely handle all the pleasure he was feeling.

Never before had anyone done this to him. After a few minutes of the act, Sans started to get tense.

"Frisk I THINK I'M GONNA-"

Suddenly, a burst of a strange substance came out. Frisk instantly fell back, spitting it all out onto the carpet. Sans, however, had flopped over backwards on the bed dizzily.

"aaahhHHHhhh…~"

The thing had disappeared. Sans pulled his pants back up, motioning for Frisk to stay in the room while he got a wet washcloth to wipe up the mess they made. Frisk nodded, still confused on why something like… that had appeared like that in her mouth.

When Sans come back, Frisk was checking out the other things in his room.

"You like to read?"

Frisk motioned to the bookshelf in the corner.

"Yeah… They were all written by people that live here in town."

Sans started cleaning up any spots on the floor that had stains on them. When he finished, he walked over to Frisk and wiped her shirt and face off.

"That… Thing you showed me actually felt kinda… Good. Are you sure Chara wasn't saying anything you wanted to know?"

Frisk blushed again.

"Uh… I… Guess…"

"Okay… Anyways, let's go to sleep. I'm kinda tired."

Frisk sat down where she was, and laid on her side. She closed her eyes, attempting to fake it. Sans laid down on his bed, pulling the covers up to his head and going to sleep. After Frisk made sure of this, she got up and walked out of the room stealthily, closing the door behind her.

"I hope Ms. Chara does not scold me."