Rule 34 Dev - 3_heads animal_genitalia animal_penis balls big_balls blue_eyes canid canid_demon canine canine_genitalia canine_penis canis cerberus claws cobra countershade_torso countershading demon dobermann domestic_dog erection european_mythology feral genitals greek_mythology green_eyes hellhound heterochromia hi_res huge_balls knot male mammal multi_head muscular muscular_feral muscular_male mythological_canine mythological_creature mythology pattarchus paws penis penis_tongue pinscher quadruped reptile scalie sheath snake snake_hood snake_penis solo tail tochka unusual_anatomy unusual_genitalia unusual_genitalia_placement unusual_penis unusual_penis_placement vein veiny_penis|13101358264