gelbooruhttps://xbooru.com/index.php?page=atom&tags=1:1 1:1 aspect ratio 2010s 2017 2boys 2d animation animated animated skeleton animation big penis blue eye bottom sans brother brother/brother brother and brother brothers duo fellatio fontcest gay gif incest lowest-of-dirt lowest of dirt male male/male male only male out of frame oral orange penis papyrus papyrus (undertale) papysans partially colored penis sans sans (undertale) seme papyrus skeleton solo focus sucking penis top papyrus uke sans undead undertale undertale (series) unseen character unseen male unseen male face yaoi2024-05-14T17:11:37Zgelbooru