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2023 abs animal_genitalia animal_penis anthro balls biceps black_balls black_sheath equid equine equine_balls equine_genitalia equine_penis first_person_view fully_sheathed genitals harness harness_only hi_res horse leather leather_harness leering looking_at_viewer looming_over low-angle_view male male_anthro mammal manly markings muscular muscular_anthro muscular_male muscular_thighs navel nipples nude pecs penis penis_tip sheath simple_background solo spots spotted_body triceps twistedhound white_background