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anal anal_penetration anal_vore ant anthro anus arthropod canid canine claws duo extreme_size_difference feet_first fox fur greyscale hair hi_res hymenopteran insect kurama male male/male male_pred male_prey mammal micro micro_prey monochrome mustelid naruto nude_male nude_pred nude_prey otter otter_tail pandottermon parker_(pandottermon)penetration perineum size_difference tail vore whiskers