Xbooru - 2010s 2015 2boys 2d 2d (artwork) animated skeleton anon anonymous anonymous male artist name blue background blue eye blue tongue bottom sans clothed cum cum on face cum on tongue digital media (artwork) ectotongue faceless male fangs fellatio genitals glowing eye jacket licking licking penis male male/male monster multiple views noxiousaberration oral penis sans sans (undertale) sex simple background skeleton solo focus submissive submissive male sweat third-party source tongue uke sans undead undertale undertale (series) unseen male face video games yaoi