Frequency

I've been sounding and playing with a silicone pee-through sound on and off for a few years. I've found it arousing, but I always have some pain when urinating afterwards. The pain seems to originate from the sphincter just inside the urethra. I haven't had blood except for years ago when too enthusiastic and in experienced. I had an enjoyable session last night and would like to repeat it, but I'm wondering if that is safe. How frequently can someone safely sound? Will that sphincter eventually stretch and adjust? Would a bumpy silicone sound help condition it?

Everyone is different.

The frequency that you can sound and not have a problem varies from person to person. Some people will get a UTI just by entering their urethra, regardless of how clean their insertions are. Repeated insertions can also result in injury resulting in scar tissue which will resut in a narrowing of the urethra. Continues stretching of the sphincter may result in incontinence if the sphincter is damaged.

Be careful.

Ok, thanks for the helpful warnings. I am always very careful and clean ever since I encountered blood years ago. If I do pursue a bumpy sound, I will continue those practices. I expect some burning immediately after a session when lube is pushed out the urethra during urination, however, I'm wondering if the burning near the sphincter when urinating is normal 12+ hours after sounding. It happens everytime for me and I've never gotten a UTI.

Yes, practice makes perfect. I work out every 2 days for about 1 to 2 hours by Hegar dilator. Of course, a Pain Relief gel is helpful for a diameter increase. I use Xylocaine gel 2%. Then of course you have to be careful that you do not increase too fast, because you can hurt yourself otherwise, because you feel less pain. So slowly increase the diameter. The only way I can take the next leap 0.5 mm in 2-3 months. Meanwhile, I'm at 18 mm, I started at 6 mm diameter. A 11,5 mm diameter and 19 cm long Hegar dilator I get past the prostate. Very pleasant feeling, then I can masturbate just fine. There are in the urethra into the bladder on the way three constrictions. The first is the lack of space which is located on the gloss side at the level of the frenulum approach. The second bottleneck

Anesthetizing the urethra for larger insertions is not a good idea.

Practice does not make perfect.

Perfect practice makes perfect.

As Switchablesue said:

Anesthetizing the urethra for larger insertions is not a good idea.

Its because you can cause serious trauma and even perforate the urethra while it is anesthetized and you would not be aware due to the loss off sensation.

@FunnStrict not always the case and you can cause serious and potentially life changing injury. Incontinence ,stricture formation from scar tissue and life threatening infection, especially in men ( we tend to get much more septic with UTI's) that usually require hospitalization .