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anal anal_penetration anthro artxtcy balls belly bodily_fluids brown_body canid canine canis colored_sketch domestic_dog ejaculation erection eye_roll foreskin genitals humanoid_genitalia humanoid_penis male mammal musclegut muscular navel nipples nude open_mouth overweight partially_retracted_foreskin penetration penis restrained restrained_by_tentacles simple_background sketch snot solo spread_legs spreading struggling tentacle_around_arm tentacle_in_ass tentacle_penetration tentacles vein veiny_penis