Rule 34 Dev - 2017 all_fours anal anal_knotting anal_sex animal_genitalia animal_penis anthro anus ass backsack balls blush bound canine canine_penis corgi cum cum_inside doggy_style duke_corgi duo erection from_behind_position fur furry furry_only gay knot knotting male mammal no_humans nude open_mouth pandx penetration penis ruska sex simple_background tongue yaoi|3332625080