Xbooru - 2010s 2018 2boys 2d 2d (artwork) animated skeleton artist name black background blush bottom sans brother brother/brother brother and brother brothers clothed clothed male clothing comic comic page comic panel couch digital media (artwork) dominant dominant male domination duo echoheartx ectopenis elegantfolly english text fontcest fully clothed fully clothed male gloves grabbing head head grab hooded jacket hoodie imminent fellatio imminent incest imminent oral incest jacket male male/male male only maledom malesub monochrome monster orange penis papyrus papyrus (undertale) papysans partially colored penis prehensile penis sans sans (undertale) seme papyrus sequence sequential sitting sitting on couch sitting on sofa skeleton sofa submissive submissive male tentacle penis text top papyrus uke sans undead undertale undertale (series) video game character video games yaoi