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anthro anus balls bent_legs big_butt butt clothing cropped dragon_ball footwear footwear_only genitals greyscale hand_on_butt huge_butt looking_at_viewer looking_back looking_back_at_viewer lying male monochrome mostly_nude on_side overweight penis piano_(dragon_ball)pinup pose prehistoric_species presenting presenting_hindquarters pterosaur reptile scalie sketch solo submarine_screw