About sepsis: make sure your sounder has been thoroughly disinfected before inserting. Otherwise, it could kill you. 

Since I had never sounded before I bought the smallest diameter sounding rod I could find. As soon as it came, I tried it out and was amazed at how far inside I could put it. But I wondered, how come I'm not getting a boner, isn't this supposed to turn me on? It had absolutely no effect on me sexually, even though it felt good. Mentally there was just nothing sexual in it. So, I invited a guy over who was really into sounding, he had a collection of different lengths and diameter rods. Watching him did get me hard, so I tried out mine again and NO way could I get it to even half as far inside as when I was soft. Since the rod was metal there was no way I was going to force it and maybe end up in the ER. Next time he came over with a sounding buddy of his. He took out a rod that was at least a foot long. They stood facing each other and like you'd use a double ended dildo they each put an end of the rod up their dicks and jacked each other off. It was fun to watch but since my now ex wasn't at all interested in sounding, I lost interest in it real quick. 

This can be a great way of enhancing the pleasure and intensity of an extended masturbation session. However I have a few caveats and suggestions to make it a positive experience. First of all, use a medical grade plastic catheter. It is flexible and will follow the natural curves of your urethra all the way up until it enters your urinary bladder. It also has a blunt end which reduces the risk of puncturing anything. A rigid object can cause internal bruising and possibly tears in the tissue. Also, a catheter has a hole in the front and is hollow so if it enters the urinary bladder, urine will come out the other end telling you you've gone too far up inside you. Whereas if you use a solid rigid object you could go too far up inside you and possibly puncture your urinary bladder without realizing it which results in you pissing blood and calling for a trip to the emergency room and possibly major surgery. Not to mention being asked questions you would prefer not to answer even though the medical people asking the questions already know the answers. And, most importantly, you must always practice sterile procedure. That means washing whatever you use first with anti-bacterial soap then after rinsing wash it again with alcohol. Repeat this again when you're finished. And before insertion of whatever you use, be sure to wipe your cocked and especially your meatus with alcohol. And if it's a catheter you are using, wash it inside as well as outside. Then for a lubricant use only medical grade KY Jelly. This is imperative or you risk giving yourself a urinary tract infection which left untreated could develop into sepsis which could kill you. Follow these guidelines and you can have a lot of fun without any problems. And if you use a catheter, store it after each use and cleaning in a sealable plastic bag with some alcohol in it. I hope this was helpful.