I've tried experimenting with sounding and got all the way into my bladder and etc.. Amazing feelings. I stopped due to a few concerns.
1. As you stretch it further the urine stream will be a dribble or spray uncontrollable
(SNIPPED)
I’ve been “sounding” now for a couple of years using large diameter catheters. I have discovered a website that sells large diameter silicone sounds that are 16" and longer (easily long enough to reach well into the bladder). That’s really what I like. I wouldn’t want it any other way.
As far as any leakage goes, I haven’t really experienced that. What has happened, however, is that I can get a sudden urge to urinate and I dare not wait too long. It can be very hard or impossible to hold back and I have actually wetted myself a couple of times.
This issue usually declines or diminishes after a day or two. I actually prefer it this way because I have always had an issue whereby if I’m a little nervous or something, I have serious trouble getting the flow of urine started at all. So, I regard this stretching as an improvement, not a problem.
Interested in large diameter catheter? Check ‘em out here:
https://siliconenozzles.com/Large-11mm-and-larger_c44.htm