rule 34 ai generated anal anal knotting anal sex anatomically correct anatomically correct genitalia animal genitalia animal penis anus ass up balls bodily fluids canid canine canine penis canis detailed detailed background detailed fur director firewolf gy style duo feral feral on feral forest fox from behind position furryrock model genital fluids genitals grass hi res knot knotted knotting looking pleasured male malemale mammal mounting open mouth paws penetration penis plant precum raised tail rock sex sheath size difference teeth tree wolf 9128175