gelbooruhttps://xbooru.com/index.php?page=atom&tags=2010s 2015 2boys 2d 2d (artwork) animated skeleton artist request blue blush blue penis blush bottom sans brother penetrating brother brothers cum while penetrated digital media (artwork) ectopenis fontcest gay incest male male/male male focus male only male penetrated male penetrating male penetrating male monster naked naked male nude nude male orange penis papyrus papyrus (undertale) papysans penis sans sans (undertale) seme papyrus skeleton solo focus third-party source top papyrus uke sans undead undertale undertale (series) unseen male unseen male face video games yaoi2024-06-16T17:40:09Zgelbooru