Rule 34 Dev - 2019 animal_genitalia animal_penis balls black_balls black_penis disembodied_penis equid equine erection flare_(disambiguation) group hi_res hooves horseballs horsecock male male/male mammal medial_ring my_little_pony penis purple_eyes simple_background solo_focus spaal spread_legs spreading tongue tongue_out underhoof vein zebra|3899368112