rule 34 4 toes all fours anatomically correct anatomically correct genitalia anatomically correct penis animal genitalia animal penis bodily fluids canid canine canine penis claws countershading cum cumshot digitigrade ejaculation erection feral fur genital fluids genitals harness knot looking at viewer male male only mammal neverdream outside penis sheath solo tan body tan fur teeth text toes tongue url 3989429