Xbooru - 2020s 2021 anal animated skeleton big penis bigger dom bigger dom smaller sub bigger male bigger penetrating bigger penetrating smaller black censor bar blue blush blue hoodie blue jacket blue tongue blush bottom on top bottom sans brother/brother brothers censor bar censored penis crying drooling duo ectopenis ectoplasm english text fontcest gloves hooded jacket hoodie incest jacket larger male larger penetrating larger penetrating smaller male male penetrating mastery position monster motion lines orange penis papyrus papyrus (undertale) papysans penetration penis pixiv id 3871107 red gloves sans sans (undertale) seme papyrus sex sitting on lap sitting position skeleton small sub small sub big dom smaller penetrated smaller sub smaller sub bigger dom socks sweat tears text thrusting tongue tongue out top papyrus uke sans undead undertale undertale (series) unseen male face