Rule 34 Dev - 2018 all_fours anal anal_sex animal_genitalia animal_penis arctic_wolf balls bernese_mountain_dog big_dom_small_sub black_fur black_nose blue_background blue_eyes blue_fur blue_pawpads brown_fur canine canine_penis claws closed_eyes doggy_style duo erection feral feral_on_feral from_behind_position fur grey_fur half-closed_eyes knot looking_pleasured male male_penetrating mammal marjani markings multicolored_fur nude open_mouth pawpads penetration penis pink_tongue raised_tail sex side_view simple_background size_difference standing teeth toes tongue tongue_out white_fur wolf yaoi zepi|3214883184