animal_genitalia animal_penis anus balls bed bedroom bodily_fluids canine_genitalia canine_penis detailed_background detailed_fur feral furniture furryrock_(model) genital_fluids genitals inside knot laying looking_at_viewer looking_back looking_back_at_viewer lying male on_back on_bed pawpads paws penis precum realistic sheath solo spread_legs spreading throbbing_penis vein veiny_penis director_firewolf canid canine canis mammal wolf detailed hi_res