gelbooruhttps://xbooru.com/index.php?page=atom&tags=2boys animated skeleton blue blush blue penis blush brother brother/brother brother and brother brothers clothed clothing drooling dry humping duo ectopenis ectotongue fontcest gif groping groping from behind hand under clothes hand under shirt handjob humping incest kneel male male/male male only monster papyrus papyrus (undertale) papysans partially colored penis sans sans (undertale) shirt up skeleton thornisicezins tongue undead undertale undertale (series) white background yaoi2024-05-14T02:57:53Zgelbooru