rule 34 anthro arms tied black body blue body bondage bondage bound canid canine canis crab position duo ear piercing feet fetishame foot fetish foot focus fur genitals hands behind back hi res highlights coloring hybrid knot legs tied male malemale mammal masturbation pawpads paws penis piercing purple pawpads purple penis restraints rope rope bondage spread legs spreading teasing white body white fur wolf 6128941