Xbooru - 2010s 2016 animated skeleton bed big dom big dom small sub bigger dom bigger dom smaller sub bigger penetrating bigger penetrating smaller blue blush blue tongue blush bottom sans brother and brother brother penetrating brother brothers clothed duo ectopenis ectotongue eli-sin-g fontcest incest indoors kolesjoie larger penetrating larger penetrating smaller leg lift male male penetrating off shoulder off shoulders on bed orange blush orange penis papyrus papyrus (undertale) papysans penetration penis sans sans (undertale) seme papyrus sex sex on bed skeleton small sub small sub big dom smaller penetrated smaller sub smaller sub bigger dom tongue tongue out top papyrus uke sans undead undertale undertale (series)