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4_toes anthro between_feet bodily_fluids border_collie canid canine canis collie digit_ring domestic_dog duo extreme_size_difference feet female foot_fetish foot_focus foot_play herding_dog hi_res jewelry macro male male/female mammal pastoral_dog pawpads paws ring sheepdog size_difference sweat sweaty_feet toe_ring toes yumi_akiyama_(character)yumiakiyama