Rule 34 Dev - 5_fingers abs anatomically_correct animal_genitalia animal_penis anthro anus balls biped black_body black_fur black_hair blue_eyes equine_genitalia equine_penis fingers flaccid fur genitals grey_body grey_fur hair hooves inviting looking_at_viewer male markings medial_ring mottled mottled_genitalia mottled_penis nude penis pose simple_background sitting solo spots spotted_body spotted_genitalia spotted_penis spotted_skin spread_legs spreading white_body white_fur valderic_blackstag dakota_(dark_stallion) equid equine horse mammal 2014 digital_media_(artwork) hi_res pinup signature watermark|3789251375