Rule 34 Dev - 2017 all_fours anal anal_sex animal_genitalia animal_penis anthro anus balls blue_eyes brown_fur brown_hair canine canine_penis collie dildo fucking_machine fur hair knot looking_at_viewer looking_back machine male male_only mammal masturbation nude penetration penis raised_tail sex_machine sex_toy solo tongue tongue_out white_hair zambuka|2783682944