rule 34 2017 54 5 fingers animal genitalia anthro anus auto penis lick black penis blue eyes blue tongue chewycuticle digital media artwork dragon elektro maxwell1394 erection genital slit hi res horn licking long tongue male male only masturbation membranous wings nude open mouth oral penis presenting presenting penis purple skin simple background sitting slit solo spade tail spread legs spreading tongue tongue out wings 2664362