FURVERT!

16th_century ancient_art animal_genitalia balls barely_visible_balls barely_visible_genitalia barely_visible_sheath equid equine feral fully_sheathed fur genitals hooves horse jan_van_der_straet_(stradanus)male male_feral mammal mane public_domain quadruped sheath solo stain standing tail traditional_media_(artwork)unguligrade