Xbooru - 1:1 1:1 aspect ratio 2010s 2018 2boys alternate clothing alternate costume animated skeleton big dom big dom small sub big penis bigger dom bigger dom smaller sub bigger penetrating bigger penetrating smaller blue blush blush bottom sans bottomless brother brother/brother brother and brother brothers carrying partner clothed couch couch sex crying crying with eyes closed door duo duplicate ectopenis fontcest implied bondage incest indoors larger penetrating larger penetrating smaller legs apart legs held open legs spread lower resolution duplicate male male only monster non-consensual noncon nonconsensual nsfwgarbagedump on couch on sofa orange penis papyrus papyrus (undertale) papysans partially clothed penetration penis rape reverse suspended congress sans sans (undertale) seme papyrus sex sitting sitting on couch sitting on sofa skeleton small sub small sub big dom smaller penetrated smaller sub smaller sub bigger dom socks socks on sofa tears top papyrus uke sans undead undertale undertale (series) yandere yandere papyrus yaoi