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abs angry anthro bdsm belt big_muscles bondage bottomwear bound brown_belt canid canine canis chain chair chair_bondage clenched_teeth clothing detailed_background dobermann domestic_dog exposure_variation furniture hands_behind_back hi_res interrogation_room lying male mammal masbrowndog muscular muscular_anthro muscular_male narrowed_eyes navel on_back on_chair pants pecs pinscher question_mark sitting solo spread_legs spreading teeth