Rule 34 Dev - anatomically_correct anatomically_correct_genitalia anatomically_correct_penis animal_genitalia animal_penis anus balls bovine_genitalia bovine_penis butt duo equine_genitalia equine_penis erection feral feral_on_feral from_behind_position genitals hooves interspecies lemon_testicles male male/male mounting penis raised_tail rear_view sex simple_background tail tail_anus spera bovid bovine cattle draft_horse equid equine horse mammal percheron|4207988155