anal_juice animal_genitalia animal_penis anthro anus back_muscles balls bara barazoku big_balls big_penis bodily_fluids brown_body brown_skin equine_genitalia equine_penis erection flared_penis gaping gaping_anus genital_fluids genitals hooves jungle low-angle_view male medial_ring muscular muscular_anthro muscular_male penis perineum precum puffy_anus rear_view saggy_balls solo sweat sweatdrop sweating sweating_profusely sweaty sweaty_body three-quarter_view vein veiny_penis rulethony34tano_(director) equid equine horse mammal tail hi_res