Rule 34 Dev - anthro asriel_dreemurr biffalo blush bodily_fluids bovid caprine cum cum_in_mouth cum_inside duo faceless_character faceless_male fellatio femboy genital_fluids goat hi_res kneeling male male/male mammal oral penile sex tail tail_tuft thick_thighs tuft undertale undertale_(series) yaoi|12787043680