Xbooru - 1boy 1cuntboy 2010s 2015 2d 2d (artwork) animated skeleton bigger male bigger penetrating bigger penetrating smaller blue blush blue clitoris blue jacket blue pussy blush bottom on top bottom sans bottomwear brother brother/brother brother and brother brother penetrating brother brothers brown background clitoris clothed clothing cuntboy cuntboy penetrated digital media (artwork) drooling duo ectopenis ectopussy fontcest genitals gloves glowing glowing genitalia glowing penis heart-shaped pupils heart eyes incest jacket larger male larger penetrating larger penetrating smaller male male/cuntboy male only male penetrating male penetrating cuntboy monster orange blush orange penis papyrus papyrus (undertale) papysans penetration penetration through clothes penis penis through clothing pussy pussy through clothing red gloves royalstash sans sans (undertale) seme papyrus sex sex through clothes simple background sitting skeleton smaller cuntboy smaller penetrated solid color background text top papyrus topwear uke sans undead undertale undertale (series) vaginal vaginal penetration vaginal sex video game character video games yaoi