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abstract_background anthro arnold_(shy001)balls blush bodily_fluids body_hair canid canine canis chest_hair cum deltoids domestic_dog duke_(nightterror)duo ejaculation erection exercise feet foot_fetish foot_play footjob foreskin fur genital_fluids genitals grey_body grey_fur hi_res humanoid_feet humanoid_genitalia humanoid_hands humanoid_penis looking_at_another male male/male mammal muscular muscular_anthro muscular_arms muscular_male nightterror open_mouth pecs penile penis plantigrade quads reach_around sex sexercise side_view simple_background teeth triceps vein veiny_penis white_body white_fur wolf