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abs anthro aquatic biceps big_muscles blush bottomwear bulge canid canine canis chest_tuft clothed clothing duo erection fangs fish fur genitals gills hi_res lifeguard male male/male mammal muscular muscular_male open_mouth pecs penis scar shark sharp_teeth shorts simple_background size_difference speedo swimwear teeth topless triceps tuft tush_(artist)underwear vein wolf