Rule 34 Dev - animal_genitalia animal_penis anthro biped black_eyebrows black_hair black_nipples black_penis cloud day detailed_background equine_genitalia equine_penis eyebrows fur genitals grass grey_body grey_fur grin hair half-erect hand_behind_head holding_penis looking_at_viewer male multicolored_penis muscular muscular_anthro muscular_male nipples nude outdoor_nudity outside partially_submerged pecs penis pink_penis plant purple_eyes rock sitting skinny_dipping sky smile solo teeth two_tone_penis urethra water waterfall wet arcticlion bucephalus equid equine horse mammal 2018|7372348095