FURVERT!

animal_genitalia animal_penis anthro balls big_balls bodily_fluids cum ejaculation equid equine equine_genitalia equine_penis genital_fluids genitals grey_background hair hi_res holding_penis hooves horse male mammal masturbation medial_ring monochrome muscular niannn orgasm penis saggy_balls simple_background sketch solo vein veiny_penis