Rule 34 Dev - 2021 animal_genitalia animal_penis anthro athletic athletic_anthro athletic_male balls biceps blue_eyes brown_body brown_hair digital_media_(artwork) dimonis equid equine equine_penis ganachethehorse genitals hair hi_res hooves horse male mammal muscular muscular_anthro muscular_male nature nipples nude outside penis signature smile solo teeth teeth_visible waterfall watermark|5992245520