gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2015 2boys 2d 2d (artwork) animated skeleton blue tongue blush bottom sans clothed clothed/nude duo ectotongue fellatio fire elemental genitals grillby grillby (undertale) grillsans ladybumtickler licking licking penis male male/male male only monster naked naked male nude nude male orange body orange penis penis sans sans (undertale) seme grillby skeleton sniggysmut third-party source top grillby uke sans undead undertale undertale (series) video game character video games white background yaoi2024-06-19T21:39:24Zgelbooru