gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2016 2boys 2d 2d (artwork) anal animated skeleton bigger dom bigger dom smaller sub bigger male bigger penetrating bigger penetrating smaller bottom sans dark background digital media (artwork) glowing hair hornyraptor humanoid humanoid robot larger male larger penetrating larger penetrating smaller male male/male male only male penetrating mettasans mettaton mettaton ex missionary position penetration robot robot boy robot humanoid sans sans (undertale) seme mettaton sex skeleton small sub small sub big dom smaller penetrated smaller sub smaller sub bigger dom thrusting top mettaton uke sans undead undertale undertale (series) video game character video games yaoi2024-06-16T07:45:17Zgelbooru