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2025 aggressive animal_genitalia animal_penis anthro bodily_fluids canine_genitalia canine_penis countershading domestic_cat duo erection felid feline felis female genitals hi_res knot knotted_penis male male/female mammal nonbinary_(lore)nude nude_anthro nude_female nude_male penis pink_background pinned predator/prey qtipps saliva scared sergal shaking sharp_teeth simple_background tail teeth tongue trembling vulva