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4:3 animal_genitalia animal_penis anthro armpit_hair balls big_balls big_penis body_hair canid canine canine_genitalia canine_penis canis duo extreme_size_difference fur genitals green_background grey_body grey_fur haruki_damaku hi_res huge_balls huge_penis hyper hyper_balls hyper_genitalia hyper_penis kaji_aldewolf knot knotted_penis lying lying_on_balls macro male male/male mammal micro muscular muscular_anthro muscular_male nude_anthro nude_male on_back pecs penis penis_bigger_than_torso purple_background simple_background sinisterheaven size_difference spread_legs spreading wings wolf