FURVERT!

4:3 animal_genitalia animal_penis anthro auric balls canid canine canine_genitalia canine_penis duo erection fellatio fully_erect_inside_sheath genitals knot knot_in_sheath licking male male/male male_penetrated male_penetrating male_penetrating_male mammal navel nude oral penetration penile penis penis_lick penis_tip piercing pinch scrotum_pull sex sheath tongue tongue_out