Xbooru - 2010s 2017 2boys 2d 2d (artwork) animated skeleton announcing orgasm artist request bottom sans digital media (artwork) duo english text fire elemental grillby grillby (undertale) grillsans imminent cum imminent ejaculation imminent orgasm male male penetrating nude nude male orange body penetration pov receiving pov sans sans (undertale) seme grillby sex skeleton solo focus submissive pov taker pov text text bubble top grillby uke sans undertale undertale (series) video games yaoi