Rule 34 Dev - abs all_fours anal anatomically_correct anatomically_correct_genitalia anatomically_correct_penis animal_genitalia animal_penis anthro balls big_dom_small_sub bodily_fluids border canine_genitalia canine_penis cum cum_in_ass cum_inside dominant duo erection felching fur genital_fluids genitals grey_body grey_fur human_on_anthro interspecies knot lying male male/male muscular muscular_male neck_tuft nipples nude on_back oral penis rimming sex simple_background size_difference tuft white_border edwiener canid canine canis human mammal wolf|5406022335