rule 34 2016 5 fingers all fours anal anal sex anatomically correct anatomically correct penis animal genitalia animal penis anthro anthro on anthro arm grab barefoot beach biped black markings black nose black pawpads black penis blush brown fur brown tail canine canine penis collar countershade face countershade torso countershading cutaway detailed background dipstick tail gy style drooling duo ear markings ears back erection facial markings felix felixfox fight artist fox from behind position fur furry german shepherd green eyes grin internal knot knotting looking away looking down male male penetrating mammal markings multicolored tail nude outdoors pawpads paws penetration penis pink penis pinned purple fur purple markings purple tail red hair saliva sea seaside sex side view signature snout sunrise tan countershading tan fur tan tail teeth water white fur white tail xasyr yaoi yellow eyes 2221667