FURVERT!

4_toes animal_genitalia animal_penis anthro ass_up backsack balls barefoot bdsm biped black_pawpads bondage bound butt canid canine canine_genitalia canine_penis claws feet fox gag gagged genitals green_eyes hi_res knot looking_back male mammal mosa nude pawpads penis red_fox ring_gag rope silver_fox solo spread_toes submissive submissive_male toes tongue tongue_out true_fox