gelbooruhttps://xbooru.com/index.php?page=atom&tags=1:1 1:1 aspect ratio 2020s 2023 2boys 2d 2d (artwork) after deepthroat after fellatio after oral animated skeleton big penis blue blush blush bottom sans brother brother/brother brother and brother brothers deepthroat duo ectopenis fellatio fontcest huge penis incest long penis male male/male male only monster monster cock monster penis oral orange penis papyrus papyrus (undertale) papysans partially colored penis purplebluepen45 sans sans (undertale) seme papyrus sex skeleton solo focus top papyrus uke sans uncensored undead undertale undertale (series) unseen male face veiny penis video games yaoi youfoundta2024-05-10T03:23:44Zgelbooru