gelbooruhttps://xbooru.com/index.php?page=atom&tags=2boys 2d 2d (artwork) animated skeleton big dom big dom small sub big penis bigger dom bigger dom smaller sub bigger male bigger penetrating bigger penetrating smaller biting clothes biting shirt blush bottom sans clothed clothing comic crying crying with eyes open dialogue digital media (artwork) duo english text erection forced hair hair over one eye heart humanoid humanoid robot hurt hurt expression larger male larger penetrating larger penetrating smaller male male/male male only mettasans mettaton mettaton ex monochrome monster open mouth partially colored penetration penis questionable consent robot robot boy robot humanoid robotic penis sans sans (undertale) seme mettaton sex simple background skeleton small sub small sub big dom smaller penetrated smaller sub smaller sub bigger dom smile surprise sex tears text thesourceofmysins tongue top mettaton uke sans undead undertale undertale (series) video game character video games yaoi2024-06-16T21:00:19Zgelbooru