Xbooru - 2010s 2017 2d 2d (artwork) animated skeleton blue blush blush bottom on top bottom sans bottomless brother brother/brother brother and brother brother penetrating brother brothers comic sans digital media (artwork) duo ectopenis english text fontcest gloves gradient background holding hands hoodie incest interlocked fingers intertwined fingers looking at viewer male male penetrating male pov mmmemmo onomatopoeia orange penis papyrus papyrus (undertale) papysans penetrating pov penetration penetrator pov penis pov power bottom red gloves sans sans (undertale) seme papyrus sex skeleton solo focus text top papyrus uke sans undead undertale undertale (series) unseen male unseen male face video games yaoi yellow background