Xbooru - 2010s 2017 2boys 2d 2d (artwork) ahegao anal animated skeleton announcing orgasm artist name blue blush blue tongue blush boots bottom sans bottomless skirt brother brother/brother brother penetrating brother brothers christmas christmas hat christmas outfit clothed clothing comic comic page comic panel couch couch sex crossdressing cum digital media (artwork) drooling duo ectopenis ectoplasm ectotongue edit edited ejaculation english text fontcest from front position gloves hat holidays incest interlocked fingers intertwined fingers large filesize legwear long image making out male male/male male only male penetrated male penetrating male penetrating male merry christmas midriff missionary position monochrome monster orgasm papyrus papyrus (undertale) papysans partially colored penetration red blush red penis red tongue removing glove saliva saliva trail sans sans (undertale) santa costume santa hat scarf seme papyrus sequence sequential sex short skirt skeleton skirt sofa stockings talking tall image tears text third-party edit thornisicezins thrusting tongue top papyrus topwear touching crotch tumblr username typo uke sans undead undertale undertale (series) video games wink yaoi