Rule 34 Dev - 2023 animal_genitalia animal_penis anthro armpit_hair balls big_penis body_hair brown_body brown_fur brown_hair bulge clothed clothing equid equine equine_genitalia equine_penis erection exercise facial_hair fur genitals goatee hair hi_res horse juiceps kvasir male male_only mammal medial_ring musclegut muscular muscular_anthro muscular_male nipples nude pecs penis pubes sitting solo topless weight_machine weightlifting workout|8417267320