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