rule 34 4 toes 5 fingers alligator alligatorid animal genitalia animal penis anthro arm wraps claws crocodilian erection feet fingers fur genitals gradient penis gradient tail green body green fur hoot artist hybrid lutrine male mammal markings multicolored body mustelid nude penis red eyes reptile scalie simple background solo spiked tail spikes spikes anatomy standing toes whiskers wraps yellow claws yellow sclera 6305832