Rule 34 Dev - anthro ass balls clothed clothing equid equine genitals grin horse kurtis496 looking_at_viewer looking_back looking_back_at_viewer male mammal muscular muscular_butt muscular_male panties panties_only presenting presenting_hindquarters raised_tail sky smile solo string_panties tail teasing teasing_viewer topless underwear underwear_only|11822624984