2018 4_toes all_fours anal anal_sex animal_genitalia animal_penis anthro anthro_on_anthro anus ass ass_up backsack balls bed bedroom belly bent_over big_belly big_dom_small_sub butt_focus canine canine_penis cum cum_in_ass cum_inside digitigrade doggy_style duo ejaculation erection excessive_cum fish fox from_behind_position fur hi_res hindpaw inflation knot levi_(character) male mammal marine nude pawpads paws penetration penis perineum pink_pawpads raised_tail rear_view sex shark simple_background size_difference soles spread_legs spreading stomach_bulge sushi_(character) tight_fit toes viola_bat white_balls white_fur yaoi yellow_fur