If you feel pain or prickling you're doing it wrong.I tried sounding once, with a well lubricated instrument.
It hurts a bit, but also gives an extremely uncomfortable prickling sensation. It's a nope for me.
Also, for the rest of y'all, no glass in your pee holes. You should be using metal sounding rods specifically designed for sounding.
My 'weirdest' actually achievable kink is maybe dollification? Like me being turned into a person-sized doll and used as such. I have this fantasy of being painted to look artificial, ball-joints and such, dressed up, and put into a glass display case in a public area? Maybe even with a remote control vibrator with a button passers-by could press on the outside of the case (not that they would know it activates a vibe). Maybe the button is labeled 'make her move' or something like that, and I have to do a seemingly pre-'programmed' move sequence like turning my head and waving robotically.