Rule 34 Dev - alchemy anal anal_penetration animal_genitalia animal_penis anthro balls book bookshelf bound canine_genitalia canine_penis cauldron erection fur furniture genitals grey_eyes inside knot magic male multi_nipple nipples nude open_mouth penetration penis slime solo tentacles tongue okytheoky kingrusty border_collie canid canine canis collie domestic_dog herding_dog mammal pastoral_dog sheepdog 1:1 digital_media_(artwork)|7257515965