FURVERT!

1:1 2_tails aged_up anal anal_knotting anal_penetration anatomically_correct anatomically_correct_genitalia anatomically_correct_penis animal_genitalia animal_penis anthro anus ass_to_ass back_muscles backsack balls blue_eyes bound canid canine echidna echidna_penis english_text fur genitals hi_res humanoid knot knotting knuckles_the_echidna male male/male mammal miles_prower monotreme multi_tail muscular mykiio penetration penis purple_eyes raised_tail red_body reverse_doggystyle sega sonic_the_hedgehog_(series)stuck stuck_genitals stuck_knot stuck_penis stuck_together tail text white_body white_fur yellow_body yellow_fur