almost anything will leave temporary marks. get a length of rope and tie it around the mattress/boxspring. then tie her to that. i would advise against neckties/pantyhose as they can be difficult to remove if tightened too far. be sure to place about two fingers of space between individual wrist and the rope/tie/whatever as you tighten it. have a pair of emt scissors handy in case of an emergency. do NOT use sliding/slip knots. check for circulation issues often. temperature of hands, color of nails, and capillary refill (how fast the nails return to normal color after you've squeezed them) http://www.massachusettsbondage.com/tutorials/freeTutorials.html http://www.bdsm-chicago.com/cram/CRAM_tuts.html http://www.shibarilover.com/lessons.htm this is going to go in the archives, so post whatever decent links you people can find.