Xbooru - ... 13thcatofthegate 2010s 2018 2boys 2d 2d (artwork) 2males animated skeleton bigger male blue blush blue tongue blush brother/brother brothers comic comic page comic panel comic sans digital media (artwork) duo ectotongue english text fontcest gay hand on another's chest hand on chest incest indoors kissing kissing cheek larger male licking tongue making out male male/male male only monster orange blush orange tongue papyrus papyrus (undertale) papysans partially colored sans sans (undertale) shirt removed shorter male skeleton smaller male speech bubble spoken ellipsis taking off clothes taller male text text bubble tongue topless topless male undead undertale undertale (series) undressing undressing another undressing partner video game character video games yaoi