HA! You think that's a torture device??
Here's one that makes the rest of them look like baby toys... link
It's guaranteed to kill brain cells fast, and those immune to it are those who have no brain cells left.
I recommend the museum in Balboa Park, San Diego, which is dedicated to this kind of stuff, if you're really interested.
It makes the (imagined) pain all the more wincingly excruciating when you see these things in the flesh.
I take that kind of thing with a grain of salt - isn't it quite widely proven that the chastity belt never actually existed until Victorian times? The ones that exist were forgeries made then to show how uncivilised the world was and how wonderful things were for the people who lived under the good Queen Vic.