Xbooru - 13thcatofthegate 2010s 2018 2boys 2males animated skeleton arms around another arms around another's neck arms around neck bigger male blue blush blue penis blue tongue blush bottom sans brother/brother brothers comic comic page comic panel comic sans duo ectopenis ectotongue english text fontcest gay handjob hands around neck incest indoors larger male male male/male male only monster orange blush papyrus papyrus (undertale) papysans partially colored penis sans sans (undertale) seme papyrus sequence sequential shorter male skeleton smaller male soul soul sex speech bubble taller male text text bubble tongue top papyrus uke sans undead undertale undertale (series) yaoi