Interesting article one sounding and urethra play

This doctor states:

"Is it safe?

Yes! But only if you do it properly. "

https://www.healthline.com/health/urethral-sounding#how-to

Well that’s encouraging. I’m about to try sounding for the first time and have been a bit nervous.

Simple and fairly self explanatory.

If its not clean or not yours clean it well.