Sorry if this should go in the mall, but I thought it was neat. I ran across a link to this site in a thread elsewhere about locking labia piercings. The "forever ring" here clicks and locks shut and can't be re-opened At 850 (euro I believe) its a bit pricey, and it's only a 3mm ring (between 10 and 8 ga), but using something like this to secure a steel chastity cage into a PA would make it pretty long term. Not to mention at that price you'd have to think long and hard about cutting it. http://www.goldschmiede-oro.de/intimschmuck.html It's in German, there doesn't seem to be an English version, but if you use Chrome, it'll offer to translate for those who need it.