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anthro avian balls beckoning big_balls big_penis bodily_fluids body_hair bovid caprine duo genital_fluids genitals gesture greyscale hairy_balls hi_res horn humanoid_genitalia humanoid_penis infernal-beggar knot looking_at_viewer male male/male mammal monochrome muscular muscular_male open_mouth penis precum pubes smile standing vein veiny_penis