It goes right through the urethra. Or rather, it did. I have taken it now. I loved it and I miss it but it was interfering with my wife's sex life. I plan to get a regular PA done next month and see if that works better so I will get some fresh pictures up soon.
Tried sounding a few times, but the last time I must have torn something deep inside, 9mm sound was all the way in, went in easily without force, but when it was withdrawn the amount of blood that came terrified me. Stopped after a while, but not tried it since, so just a word of caution to any newbies out there who may be going to try it.