Xbooru - 13thcatofthegate 2010s 2018 2boys 2males animated skeleton bigger male blue blush blush bottom sans brother/brother brothers comic comic page comic panel comic sans duo ectotongue english text fontcest gay incest indoors larger male licking licking neck male male/male male only monster orange blush orange tongue papyrus papyrus (undertale) papysans partially colored 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 topless topless male uke sans undead undertale undertale (series) yaoi