Rule 34 Dev - anus balls black_hooves blue_eyes equid equine equine_anus erection feral genitals grass grey_mane grey_tail hi_res hooves horse huskii-s lips lying male mammal mane medial_ring on_side penis pink_anus pink_penis plant presenting presenting_anus presenting_penis simple_background solo tail thick_lips vein veiny_penis white_balls white_body|11786070208