Rule 34 Dev - 2017 animal_genitalia animal_penis anus backsack balls black_fur brown_fur dust equine equine_penis feral full-length_portrait fur grey_background half-erect hooves horse horsecock huge_cock male male_only mammal multicolored_fur penis portrait raised_tail rear_view simple_background solo svadil two_tone_fur vein veiny_penis white_outline|2804595216