Rule 34 Dev - 2014 4_toes abs animal_genitalia anthro ass back balls biceps bigger_version_at_the_source black_fur black_nose brown_fur canine canine_penis claws clef clefwolf close-up closed_eyes cum cum_string cutaway duo erection fangs fellatio fur g-wolf gay grin hindpaw knot leaking male mammal musclegut muscular musical_instrument nipples nude open_mouth oral pawpads paws pecs penis penis_grab piano piercing plantigrade pose precum sex sheath simple_background sitting smile soles sucking teeth toe_claws toes toned tongue wfa white_fur wolf yaoi yellow_fur yellow_pawpads|2066624200