gelbooruhttps://xbooru.com/index.php?page=atom&tags=2020s 2023 2boys animated skeleton blue belly blue blush blush bodily fluids boner blossom bottom sans brother brother/brother brother and brother brother penetrating brother brothers clothed clothing drooling duo ectobelly ectopenis english text fantasizing fontcest hooded jacket hoodie imagining implied penetration implied sex incest jacket line art lineart looking at penis male/male male only male penetrated male penetrating male penetrating male monster orange penis papyrus papyrus (undertale) papysans penis pleasure face precum precum drip profanity sans sans (undertale) seme papyrus skeleton sweat text thought bubble top papyrus twitter username uke sans undead undertale undertale (series) veiny penis white background yaoi2024-05-13T11:49:13Zgelbooru