Well Hammy, you were operating without half of the procedure...lol stands to thought, I guess?

Didn't realize sounding was within the realm of BDSM. I just thought it was a fetish. Going on to the urethra though, I would wager you could feel the opening, as that's pretty much *there*, but the rest is internal, and if...lol well, if it's in your mouth, I'd wager it's gonna be too hard to feel anything inside. Frankly speaking.