abdominal_bulge age_difference anal anal_penetration animal_genitalia animal_penis anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro ball_size_difference balls big_balls big_dom_small_sub bite biting_lip blush bodily_fluids canine_penis countershading dominant duo erection fur genital_fluids genitals knot larger_male looking_pleasured male male/male male_penetrated male_penetrating male_penetrating_male nude older_male penetration penile penile_penetration penis penis_in_ass penis_size_difference sex simple_background size_difference smaller_male smaller_penetrated smile teeth twokinds white_body anontk brutus_(twokinds) clovis_(twokinds) canid canine canis fox mammal wolf hi_res