Rule 34 Dev - all_fours anthro anus armpit_hair backsack balls biceps big_muscles blush body_hair brown_body brown_fur butt claws erection fur genitals humanoid_genitalia humanoid_penis inviting looking_at_viewer looking_back male muscular muscular_anthro muscular_male nipples nude one_eye_closed penis solo spread_anus spreading oaks16 morenatsu juuichi_mikazuki american_black_bear bear black_bear mammal ursine 2013 alternate_version_at_source|1659096250