I've started a thread on this too, and since gotten a LOT of good information, perhaps summing it up here.
Disclaimer: I am not an expert at sounding - these are just tips I have picked up. Note that you CAN hurt yourself pretty badly if you screw this up...so use caution.
Throwing Caution out there, because it's most important.
1. Sterile. That is the #1 most important and critical step voiced from everyone I have chatted with. EVERYTHING must be Sterile when inserting it into your urethra. If not, you can have a HORRID Urinary Tract Infection (UTI) with a trip to the doc/Urologist.
So clean penis, sounds, clean towels, clean Hands (sterile gloves help), clean place to do it where you can lay down and not be disturbed.
2. You'll need good stainless sounds, such as Hegar as a beginner set, sterilized. These come in a package with several sizes from tiny for women, to large for men. Generally you don't start out with the smallest size because of risk of puncturing the urethra.
3. You'll need sterile surgi-lube available online to allow the sound to slide in and down.
4. Lay on your back, with your Penis soft and lubricate with steri-lube. Gently insert the sound through the meatus lips and let the sound gravity feed its way in. You may need to pull out, re-lubricate and go again. NEVER force it down. When it stops, let it set there for a bit. You can move the skin on the shaft to see if it goes further, but you MUST let the sound find its position.
5. Start out small, and work your way up in size over time. If you go too fast, you'll have bleeding and perhaps hurt yourself.
6. Stay out of your bladder. The risk of infection at minimum doubles. Deep sounding is supposedly pleasurable - however to me the risk of a UTI is too great, and I don't need a frequent hospital visit just because of sexplay. For stretching the pee hole - stay out of your bladder.
7. Urinate right after you Sound to flush your urethra out, and restore the PH level. It will burn and sting, but it's not too bad.
8. Drink LOTS of Cranberry Juice before/after for about a week to fight any chance of infection that may have gotten in.
9. NEVER attempt to Pee or Cum with a sound in your urethra. This will force the fluids to back up into your bladder and cause an infection.
At first I thought it would be neat to do this to have a larger slit, because I have a small pee hole - however I'm actually wondering now if I have a stricture from back in 1996 when I had a catheter ripped out during an emergency room procedure.
Some have also mentioned that once your piss slit is enlarged, you will not shoot cum, rather drool it out in big quantities. So, if it's not really causing issues for you with urination - its probably best to leave it be.
Hope this helps.
I had a hypospadias. Had to get it fixed because of all the infections I was getting.
Yes - that's the other thing. Some had noted with the Urethral opening enlarged, or mis-placed by birth the chances of UTI's increases due to more dirt/bacteria able to enter the urethral tube.
I wonder why people wants to stretch the pee hole? can anyone explain?
For some it's an aesthetic thing because it can be small, for others it's due to urinary issues of not being able to void their bladder completely, which can cause urinary infections.