rule 34 5 fingers abs anatomically correct anatomically correct genitalia anatomically correct penis animal genitalia animal penis anthro areola balls biceps big balls big penis biped blue eyes brown areola brown balls brown body brown fur brown hair brown mane brown nipples brown penis butt from the front digital media artwork equid equine equine penis erection eyebrows eyelashes finger on penis fingers fur ganachethe genitals gloves marking hair hand behind head hay hi res inner ear fluff looking at viewer lying male mammal mane mane hair markings medial ring muscular muscular anthro muscular male nipples nude on back pecs penis perineum quads solo spread legs spreading stable tanutanuki teeth text tuft url vein veiny penis white body white fur 6216797