Rule 34 Dev - 2020 abs anthro balls black_balls black_penis brown_body brown_fur closed_eyes digital_media_(artwork) equid equine fur genitals hi_res horse humanoid_genitalia humanoid_penis male male_only mammal muscular muscular_anthro muscular_arms muscular_male muscular_thighs pecs penis shower_head signature solo vein veiny_penis zawn|4835101656