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1:1 2013 aaron_(artist)abs animal_genitalia anthro anthrofied athletic balls bench biceps big_balls big_muscles big_penis biped black_nose border brock_english canid canine canis chain circumcised claws collar collar_only crossed_arms digital_media_(artwork)domestic_dog erection frown fur genitals grey_body grey_eyes grey_fur hi_res humanoid_genitalia humanoid_penis indoor_nudity inside jewelry jewelry_only leaning locker locker_room looking_at_viewer male mammal muscular muscular_anthro muscular_male necklace necklace_only nude nude_anthro nude_male pecs penis pit_bull pose presenting sheath solo standing thick_penis toe_claws vein white_body white_border white_fur