I have never had a sound inserted into my penis, but I feel sure I would like it and would like to try it sometime. I have had my bladder catheterized twice.
The first time a catheter was inserted into my bladder was after I was put out for major surgery so I felt nothing obviously. But after three days in the hospital the doctor took it out. It didn't hurt, unlike the nasogastric tube he pulled out that burned like fire. He did warn me that it would.
The second time I had a catheter I was fully awake and had a very full bladder, to the point of really hurting. Because of a test they had done, I could not go by myself. The nurse asked me if I wanted a catheter and I said YES, Then she asked me if I minded if she did it or did I want a male nurse to come do it. I told her I didn't mind if she didn't so she got the catheter tray and began immediately, explaining each step before she did it. She injected some sterile lubricating gel into my urethra, using a plastic syringe, that contained an anesthetic as well. Then she inserted the catheter. I really didn't feel any pain or feel much really because of the anesthetic. I imagine one would feel more if there were no anesthetic used and that would be interesting. She did tell me that I might feel some pressure as she got down to my prostate and had to push harder to get it past that, and I did feel the extra pressure, but no pain. Once she got it in, my bladder began to empty and feel mush better. I did have some residual pain from the bladder caused by it being too full for too long, but that went away in an hour or so. The next day I went to the doctor and he removed it. Again it didn't hurt coming out.
Regrets, only that I didn't pull on the tube later when I was alone to see if I could feel the little balloon in my bladder that keeps it from slipping out or being pulled out. Next time I will pull on it to see what that feels like.
It was "interesting" to have to sleep with the urine containment bag strapped to my leg until the next day. I was half afraid it might come loose in the night and "wet" the bed, but it didn't. It was not a huge bag like the ones hung on the bed in a hospital, so I had to empty if manually pretty frequently, including once during the night.
Still, I would love to feel a sound being put in me and maybe some Tens electrical stimulation done by someone who really knows what they are doing in that area. I wonder how it would feel to have an orgasm with a sound in my penis!! Would the semen come out if the sound was in there?? Anyone know?
Please don't point out the dangers to me because I knew them then before I did it and still do, but I have inserted a glass rectal thermometer with the stubby tip on it, a couple of centimeters into my urethra AFTER I was erect and oozing precum from my penis. It felt good going in and when I twisted it back and forth and pumped it in and out, but it was glass and glass can break, not to mention the mercury in it, so I was afraid to go further. It could almost slip all the way in except for the triangular top on it. I would hate to have to explain the ER doctor why I had that stuck in me, though he or she may well have seen that already. And yes, I washed the thermometer a couple of times with soap and water, sterilized it in alcohol and let it air dry before I did that and I got no infection. Then I went ahead and had an orgasm to help flush anything out and after that I urinated to wash it out more.