FURVERT!

anal anal_penetration animal_genitalia animal_penis balls balls_touching big_balls canid canine canine_genitalia canine_penis canis dasyuromorph domestic_dog dominant duo eyes_closed feet feral feral_on_feral french_kissing genitals hindpaw intraspecies kissing knot larger_dom lying male male/male mammal marsupial nature on_side paws penetration penis quadruped recently_extinct_species size_difference thylacine thylus unbreakable-warrior