gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2015 2boys 2d 2d (artwork) artist request black hair blue background blue blush blue glans blush cousins crying cute penis digital media (artwork) fellatio genitals ghost hair over one eye humanoid humanoid robot incest licking licking penis male male/male male only mettablook mettaton mettaton ex napstablook oral penetration penis pink eyes pink tongue robot robot humanoid sex simple background small penis smooth penis solid color background tears tongue undertale undertale (series) video games yaoi2024-05-09T23:05:28Zgelbooru