Xbooru - 2boys anal anal fingering anal sex animated skeleton bigger dom bigger penetrating bigger penetrating smaller black shorts blue blush blue penis blue tongue blush bottom sans bottomless carrying carrying another carrying partner carrying position clothed clothing cum cum in mouth duo ectopenis ectoplasm ectotongue fellatio fingering fire elemental from behind position glasses grillby grillby (undertale) grillsans handjob heart hooded jacket hoodie jacket kissing larger male larger penetrating larger penetrating smaller making out male male/male male only male penetrated male penetrating male penetrating male monster oral orange body orange penis penetration penetration from behind penis pink background reverse suspended congress sans sans (undertale) sansby sex shandrawaka shorts simple background skeleton smaller male smaller penetrated stand and carry position tears uke sans undead undertale undertale (series) yaoi