Xbooru - 2020s 2021 2boys animated skeleton artist name beetleevil biting clothes biting shirt blue blush blush blushing male bottom sans brother brother/brother brother and brother brothers clothed clothing crotch rub cussing dirty talk dry humping duo ectoplasm english text evilbeetle fontcest glowing genitalia grabbing wrist grey background hand on crotch heart-shaped pupils heart eyes horny horny male humping incest male male/male male only moaning monochrome monster orange blush pants around legs pants around thighs pants down papyrus papyrus (undertale) papysans partially colored pervert profanity sans sans (undertale) seme papyrus sequence sequential shirt up simple background skeleton soul soul sex speech bubble spoken musical note stealth sex swearing talking to another talking to partner tears tears of pleasure text text bubble top papyrus touching crotch trembling uke sans undead undertale undertale (series) yaoi