Rule 34 Dev - 2018 animal_genitalia anthro balls barzillai biceps big_pecs clothed clothing equine explicital eyebrows fur grey_background grey_balls grey_fur grey_nipples hair harness hooves horse humanoid_hands long_tail male male_only mammal mane multicolored_fur musclegut muscular muscular_male nipple_piercing nipples nude partially_clothed pecs penis penis_tip piercing purple_eyes purple_fur purple_hair purple_tail sheath simple_background snout solo spread_legs spreading standing thick_thighs triceps|3011847552