Rule 34 Dev - animal_genitalia animal_penis anthro balls biped black_balls black_mane black_tail bodily_fluids brown_body countershading equine_genitalia equine_penis equine_tail erection fingers genital_fluids genitals hand_on_own_penis hand_on_penis hooved_fingers hooves looking_at_viewer male mane nipples nude penis precum presenting presenting_penis sitting solo tail text white_body white_countershading lunalei heracles_(theunscforces) equid equine horse mammal 2023 artist_name colored english_text url|21618510865