FURVERT!

3:4 ambiguous_gender animal_genitalia animal_penis anus balls big_balls big_penis duo equid equine equine_genitalia equine_penis erection felid fellatio feral feral_on_feral genitals hooves horse interspecies lion male male/male male_penetrating mammal moan oral oral_penetration pantherine penetration penile penis predator/prey quadruped sex sheath tail tongue unknown_artist