rule 34 3d artwork acaris artist animal genitalia animal penis anthro ass balls barefoot bed big balls big penis biped black body black scales blue eyes bondage bondage bound claws cobra cuff restraint digital media artwork digitigrade erection fangs feet forked tongue furniture genitals hi res iridescent knot male markings narrowed eyes nude penis pupils purple body purple scales reptile restraints rope rope bondage scale markings scales scalie slit pupils smooth skin snake snake hood solo sorvik spread legs spreader bar spreading text thick tail toe claws tongue tongue out url 6125989