Rule 34 Dev - anal anal_knotting anal_sex animal_genitalia animal_penis anthro anthro_on_feral anus avian big_dom_small_sub brown_fur canine canine_penis cervine feral fur gryphon hybrid knot knotting looking_back male mammal penetration penis raised_tail runa216 sex size_difference story story_in_description wolf yaoi zoophilia|3179164632