Rule 34 Dev - against_surface animal_genitalia anus balls big_butt black_anus brown_body brown_fur butt fur genitals glass glistening glistening_body glistening_genitalia grey_background looking_at_viewer looking_away male motion_lines on_glass perineum presenting presenting_anus presenting_hindquarters raised_tail saggy_balls simple_background solo shuffur brown_bear mammal ursid ursine absurd_res hi_res|7233560