Xbooru - 2023 2boys animated skeleton bad id bad twitter id bedroom blue blush blue hoodie blue jacket blue penis blush boots bottom on top bottom sans brothers clothed dark room duo erection erection under clothes fontcest fudanshipochoc gay glowing heart heart eyes hooded jacket hoodie imminent sex incest indoors jacket male male/male male only male pov monster off shoulder one eye closed orange penis papyrus papyrus (undertale) papysans penis bulge pov power bottom red boots sans sans (undertale) seductive seme papyrus skeleton solo focus top papyrus touching crotch uke sans undead undertale undertale (series) unseen male face yaoi