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2013 airless anthro anus backsack balls bear biceps biped brown_bear brown_body brown_fur brown_skin butt erection fur gaping gaping_anus genitals grizzly_bear hair hi_res humanoid_genitalia humanoid_penis looking_at_viewer male mammal muscular muscular_anthro muscular_male penis pinup plantigrade pose presenting raised_tail red_background scar scratches simple_background solo spread_butt spread_legs spreading tail thegoldenplague_(character)ursine