Xbooru - 2010s 2018 2boys 2d 2d (artwork) after deepthroat after fellatio after oral animated skeleton blue blush blue tongue blush bottom sans brothers clothed clothed male cum in mouth cum on tongue digital media (artwork) duo ectotongue english text fontcest gay hand on another's face hand on cheek hand on face hands on another's face hands on cheeks hands on face incest male male/male male only monster orange blush papyrus papyrus (undertale) papysans sans sans (undertale) seme papyrus sequence sequential sequential art simple background skeleton solo focus talking to another talking to partner text theyaois tongue tongue out top papyrus uke sans undead undertale undertale (series) video games visible breath white background yaoi