Rule 34 Dev - 2017 4_toes 5_fingers animal_genitalia animal_penis anthro athletic balls beard black_nose canine canine_penis cinta digitigrade ear_piercing erection facial_hair fur green_eyes grey_fur grin knot looking_at_viewer male male_only mammal markings multicolored_fur neck_tuft nipples nude pawpads paws penis piercing red_penis simple_background smile solo tattoo toes tribal_tattoo tuft two_tone_fur white_fur wolf|2871081696