Rule 34 Dev - animal_genitalia animal_penis anthro balls canine_genitalia canine_penis ear_piercing erection fur genitals knot looking_at_viewer male nude penis piercing scar simple_background smile solo tail white_background rukis ransom canid canine canis coyote mammal 2015 graphite_(artwork) greyscale monochrome traditional_media_(artwork)|3107130565