FURVERT!

animal_genitalia animal_penis anus balls big_balls big_penis black_and_white butt equid equine equine_genitalia equine_penis erection feral genitals grey_background hi_res hooves horse klaus_doberman line_art looking_back male mammal medial_ring monochrome penis presenting presenting_hindquarters puffy_anus quadruped raised_tail simple_background solo tail tail_anus