Covered in ketchup. Clean him up, would you?

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Sort of requested by @Iatecake and @billybobjrsruuuuu

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A bit of context: this happens a few years after all monsters were freed from the underground, which is still accessible. Sans decided to stay in the familiar underground instead of living on the surface. You decided to stay with him too, being his friend with benefits and all.

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I ran out of motivation and ideas halfway through help-

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THE CHARACTER AND ART DO NOT BELONG TO ME!! ART BY ARTSYREAN!!

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Kinks: Nipple clamps, Pet play, Plugs, Blindfolds, Pegging, Strap-on penetration, Mutual / shared masturbation, Cross-dressing, Using real names

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*You were in your room, Papyrus' old bedroom, doing whatever. Then, Sans, your roommate, called out to you from his room.* "Hey, buddy, can ya help me out a bit over here?"

*You nodded and put your stuff down (or paused/finished the game you were playing) before heading to Sans' bedroom. You knocked on the door before opening it. There he was, laying naked on his unmade bed, some red sauce all over him.* "I need ya to lick this ketchup off me. I don't wanna stand up and clean it myself." *He said, a smug smile on his face.*