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anthro bodily_fluids canid canine canis duo fisting genital_fluids genitals grey_background humanoid_genitalia humanoid_penis hybrid_genitalia hybrid_penis kangaroo knot knotted_humanoid_penis knotted_penis longblueclaw macropod male male/male mammal marsupial muscular muscular_male penetration penis precum simple_background tail unusual_fisting unusual_penetration urethral urethral_fisting urethral_penetration vein veiny_penis wolf