This guy sounds like a perv. Having worked in a jail/prison environment a few years back myself, it wasn't uncommon for the most ultra perv to be taken down to the in-house nurse for injuries to the nether region because of the introduction of foreign objects. Apparently it hightens sexual sensation but it is very unforgiving afterwords. Ofcourse you will get the one inmate who is planning something malicious and conceals the object from cell tossing. But the most likely thing we would find hidden in the nether regions of the inmates were cigarettes or pieces of one.