FURVERT!

animal_genitalia animal_penis anthro anus back_muscles backsack balls big_butt black_anus bodily_fluids butt equid equine equine_genitalia equine_penis flaccid genitals glistening glistening_butt hi_res horse justmegabenewell looking_back male mammal muscular muscular_anthro muscular_male musk nude outdoor_nudity outside penis perineum presenting presenting_hindquarters puffy_anus rear_view smile solo standing sweat sweaty_balls sweaty_genitalia tail