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4:3 anthro balls barazoku bear beard biped bodily_fluids clothing countershading cum erection facial_hair fur genital_fluids genitals hair humanoid_genitalia humanoid_penis kumatetsu male mammal masturbation muscular muscular_anthro muscular_male open_mouth penis red_body red_fur shirako simple_background sitting solo studio_chizu teeth the_boy_and_the_beast