Xbooruhttps://xbooru.com/index.php?page=atom&tags=2010 2019 2boys 2d animated skeleton blush blush lines bottom sans bottomless clothed clothed male digital media (artwork) duo ectoplasm elemental creature elemental humanoid fingering fingering another fingering partner fire elemental ganzooky glasses glowing grillby grillsans hand on another's shoulder handjob humanoid kneeling line art lineart looking away male male only monochrome monster monster boy mutual masturbation nsfwsinningsans partially clothed penis sans sans (undertale) seme grillby skeleton standing tongue out top grillby uke sans undead undertale undertale (series)2024-10-19T10:27:05ZXbooru