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accessory anthro claws cock_ring collar ear_piercing erection fur genital_piercing genitals grey_body grey_fur hair hi_res humanoid_genitalia humanoid_penis hybrid jewelry long_hair male mammal murid murine muscular muscular_anthro muscular_male nude penis penis_accessory penis_jewelry penis_piercing piercing prince_albert_piercing rat roamingthrough rodent simple_background solo spiked_tail spikes spikes_(anatomy)tail whiskers white_hair