2015 4_toes all_fours anal anal_sex animal_genitalia animated anus ass backsack balls balto_(film) brown_fur canine canine_penis clenched_teeth closed_eyes cream_fur doggy_style duo feral feral_on_feral from_behind fur grey_fur hair_over_eyes husky knot ky_(malamute) lying male mammal mocha night penetration penis poodle ralph rear_view sex size_difference sky small_dom_big_sub smile snow surprise_buttsex teeth toe_curl toes yaoi