Rule 34 Dev - 4_toes abs animal_genitalia anthro anus athletic ball_fondling balls biceps big_muscles biped black_nose brown_body brown_fur butt claws erection fangs feet flexing fondling fur genitals grey_body grey_fur hand_behind_head hands_behind_head humanoid_genitalia humanoid_penis jewelry legs_up looking_at_viewer lying male masturbation muscular muscular_anthro muscular_male necklace nude on_back pawpads paws pecs penile penile_masturbation penis pose presenting presenting_hindquarters red_eyes sheath solo spread_legs spreading teeth toe_claws toes tongue tongue_out vein drks thorn_(wolf7664) canid canine canis mammal wolf 2013 hi_res|1564399970