I attach Endza to the wall using fishing line. This might not sound like much but fishing line is both narrow and strong. So, when she pulls against it (or, for instance, some big mean guy grabs her and pulls her out away from the wall), it really digs in. We experiment with just how many newtons* it takes to break a single strand passing across her breasts, and determine with a bit of screaming that it takes quite a lot. Then I apply two strands, and test that theory some more.
* Answer: no idea. I'm just describing the process with a technical term to avoid using a word the credit card companies and merchant banks have decided you shouldn't see, regardless of the context it appears in.
