Xbooru - <3 eyes 2boys 2d 2d (artwork) after penetration after sex ahegao animated skeleton arm support bad id bad tumblr id bigger penetrating blue blush blue hoodie blue jacket blue tongue blush bone bottom on top bottom sans bottomless brother brother/brother brother and brother brothers clothed clothed male clothed sex clothing cum cum leaking cum trail digital media (artwork) drooling duo ectopenis ectoplasm ectotongue erection facing another fontcest fully clothed fully clothed male genitals gloves heart heart-shaped pupils heart eyes hooded jacket hoodie humanoid humanoid penis incest jacket kneel kneeling larger penetrating larger penetrating smaller looking at another looking at partner magic penis male male/male male ahegao male only male penetrating mastery position monster open mouth orange blush orange penis panting papyrus papyrus (undertale) papysans partially clothed penis penis through clothing power bottom red gloves sans sans (undertale) seme papyrus sex sitting skeleton smaller penetrated spoopy-gaster submissive top sweat third-party source tongue tongue out top papyrus uke sans undead undertale undertale (series) video video game character video games white background yaoi