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2022 animal_genitalia animal_penis anthro balls big_penis canid canine canine_genitalia canine_penis canis domestic_dog flexing genitals german_shepherd glowing glowing_body glowing_genitalia glowing_markings glowing_nose glowing_penis herding_dog heterochromia hi_res knot male mammal markings muscular nude pastoral_dog penis prosthetic prosthetic_limb rex_schafer shadow sheath solo unknown_artist