FURVERT!

4:3 absurd_res anatomically_correct anatomically_correct_genitalia animal_genitalia animal_penis balls becoming_erect black_balls black_penis brown_body brown_fur deep_fossa dogface equid equine equine_genitalia equine_penis erection feral flaccid flared_penis fur genitals half-erect half_bomb hi_res horse low-angle_view male mammal medial_ring partially_flared penis penis_towards_viewer pink_penis rear_view side_view solo unflared urethra urethral_fossa vein