rule 34 abs alan stevenson anal anal sex anthro balls blush canid canine canis domestic duo fur gattobamboom genitals german shepherd grey body grey fur harness herding hi res humanoid genitalia humanoid penis husky hybrid jason steiner male malemale male penetrated male penetrating male penetrating male mammal muscular muscular anthro muscular male nipples nordic sled pastoral pecs penetration penis sex spitz vein wolf 6695190