Xbooru - 1boy 1cuntboy 2020s 2021 abosinsin animated skeleton ass spanking bad id bad twitter id blue blush blue eyes blue hoodie blue jacket blue tongue blush bodily fluids bottom sans bottomless brother brother/brother brother and brother brothers butt spanking cuntboy cuntboysub dominant dominant male duo ectoplasm ectopussy english text fluids fontcest gloves grabbing sheets gripping sheets hand heart-shaped pupils heart eyes hooded jacket hoodie incest jacket kneeling looking back male maledom monster papyrus papyrus (undertale) papysans pink socks punishment pussy red gloves sans sans (undertale) seme papyrus skeleton socks solo focus spank marks spanking spanking ass spanking butt submissive submissive cuntboy sweat text top papyrus twitter username uke sans undead undertale undertale (series) unseen male unseen male face visible breath white background yaoi