Xbooru - 2boys 2d 2d (artwork) animated skeleton bigger dom bigger dom smaller sub bigger male bigger penetrating bigger penetrating smaller blue hoodie blue jacket blue tongue blush bottom sans brother/brother brother penetrating brother brothers clothed digital media (artwork) drunk duo ectopenis english text face grab fontcest from behind position ganzooky gay grabbing face highres hoodie incest jacket larger male larger penetrating larger penetrating smaller lying on snow lying on stomach male male/male male only male penetrating nsfwsinningsans one eye closed orange blush orange penis outside pants around one leg pants pulled down papyrus papyrus (undertale) papysans penetration penetration from behind sans sans (undertale) seme papyrus sex sex from behind skeleton small sub small sub big dom smaller penetrated smaller sub smaller sub bigger dom snow sweat text tongue tongue out top papyrus uke sans undead undertale undertale (series) video game character video games white background yaoi