abs anal anal_penetration anthro balls biceps big_muscles big_penis black_goo black_nose bleach blush bound brown_fur butt canine close-up erection fangs flexing fur goo internal kartos kneeling male mammal muscles nipples nude one_eye_closed open_mouth pecs penetration penis pose presenting sajin_komamura shadowfox13 sheath shinigami solo tan_fur teeth tentacles thick_penis toned tongue vein white_fur wink wolf yellow_eyes