Rule 34 Dev - 2018 anal anal_knotting anal_sex animal_genitalia animal_penis anthro anthro_on_anthro ass balls bernese_mountain_dog brown_fur canine canine_penis close-up corgi cum cum_in_ass cum_inside duke_corgi duo erection fur furry furry_only gay knot knotting male mammal no_humans nude open_mouth pandx penetration penis ruska sex size_difference small_dom_big_sub smaller_on_top yaoi|3332635088