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16:9 anthro asphyxiation bite biting_lip black_and_white canid canine canis choking claws dark_theme door duo feet female from_front_position hi_res high_contrast lying male male/female mammal missionary_position monochrome mouse murid murine nipples on_back one_leg_up open_door raised_leg rodent sex simple_background sinwhisper smile toes widescreen wolf