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Guide to Urethral Sounding

Seatlte Dominatrix Ruby Enraylls Latex Medical Fetish Mistress, Expert on Urethral Sounding

Urethral Sounding is a very popular medfet activity and due to its popularity in videos, its something that many people are curious about. The first question I am always asked is “does it hurt?” The answer should be “no!” As long as you use the appropriate lube, correct angle, adequate technique, good instruments and everything is sanitary- Sounding should NOT be painful. For that matter, catheterization really shouldn’t be either but plastic is harder to work with than metal but I digress. That’s why I threw away all of my silicone sounds.

In my opinion, soft skills like power exchange and humiliation play are much harder to master than hard skills like urethra sounding. This is because there is a simple set of rules and guidelines you can follow to achieve your goal. With soft skills, it gets a bit trickier. Let’s start with what you absolutely need to have in order to actually do urethral sounding- The gear.

The Gear for Urethral Sounding

What Urethral Sounds Should I Buy?

There are many models of sounds. For beginners, I recommend Double Ended Pratt urethra Sounds or Double Ended Hegar urethra sounds.  Rolled steel sounds are best, they are more expensive but they will last longer and you can run them through an autoclave or boil them. Sounds come either millimeters or french for sizing purposes. 1 mm is 3 fr. So a 6mm sound is also an 18fr. Typically sounds come in kits unless you are buying an unusual style but I wouldn’t recommend starting with that.

Individually Packaged Sterile Lube

Why individually packaged surgical lube? Simple. Once you open it, it is no longer sterile. That’s fine for other play but with sounding. You want to maintain as clean of a field as possible. Pretend that you are playing surgeon. When I am doing a sounding scene, I pay attention to order of operations- If there is any butt stuff, that comes last.


Cleaning Your urethral Sounds

The traditional way is boiling them or running them through an autoclave if you have it.
You want to have medical grade sealing sterilization pouches that fit your sounds, pop them in and boil them for at least 20 minutes.
Once they are done cooking, do not remove them from the package until you are ready to use them because you will break the sterile field.
However, many sounds are only coated and not solid pure steel and boiling breaks down the coating. If you aren’t sure of the quality of your sounds or you don’t have sealed medical packets to sterilize your sounds in, wipe them down with a medical grade cleaner like cavicide. However, you need to make absolutely sure to completely remove and clean the disinfectant off before use as it is harmful to humans and even melts plastics! 

Prepping for Urethral Sounding

Always inspect your sounds for any rust, degradation, cracks or rough spots before use. These cosmetic issues can be a home for bacteria or worse, cut your partner’s intimate parts during play. You definitely don’t want that! Before using my sounds,  I make sure that I have grabbed my lube packets, BZK or alcohol wipes and have wiped down a surface to hold all my things. (Medical trays or tables work well.)
If I haven’t used the boiling method, I will wipe my sounds down with alcohol or BZK if they have not been boiled and I repeat the process with my gloves and the urethra. (Pro tip: BZK doesn’t sting. But make sure to check the expiration date on anything you use, including lube.) Allow time for the solution to dry, this is how most sanitizers kill bacteria and viruses.

Beginning with Urethral Sounding

Urethral sounding is pretty straightforward. You want to match the size of the rod to the hole of the urethra, going larger means it won’t fit and too small runs the risk of scratching or puncturing the wall so it has to be just right. You are better going too large than too small though. By holding the tip of a sound near the opening to the urethra, you can guess the size.
In order to sound someone, you want to lubricate the sound, being careful to not allow the open part of the lube packet or the sound to touch other surfaces and once your sound is out of the sterile packet, you cannot set it down or touch past the handle or outside the center (depending on the type.) Don’t worry, this is the most difficult part.

Allow the Weight of the Urethral Sound to Carry it

Once your sound is lubricated, align it with the urethra and allow the weight of the sound to slowly pull it in while you gently hold the base of the penis to prevent bending (if your partner has one.) Be careful to not lose your grip or let go, as you may end up with the sound completely lost (it is retrievable but you want to avoid this.) Ask if there is ANY discomfort, burning, stretching, poking, if it hurts or feels wrong. Also look for any redness, signs of inflammation (redness or swelling,) and of course, bleeding. If all is good, then you’re good to go. Sometimes folks can have a reaction to the lube so it’s good to have a couple brand choices and/or different batch on hand. Or it may just be too inflammatory for someone that day or entirely. Everyone’s body is different and the worst thing you can do with something delicate is force it to happen. Same with fisting.

Now that your sound is comfortably inside, you can glide it in and out! Feel free to experiment with different shapes and types of sounds. One of my favorite shops is The Chain Gang. They have some great guides and typically offer much higher quality toys than you’ll run into on Amazon or your average BDSM shop as they are a specialty store.
Good luck and have fun!

Still curious? Feel free to contact me!

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Top 5 Questions Everyone asks a Dominatrix

Seattle Dominatrix Ruby Enraylls in her seattle dungeon with a Slave

Have you ever wondered what your Dominatrix’ favorite bdsm activity is? Or how you can be a better a slave? Perhaps the following can point you in the right direction. Below are my 5 most frequently asked questions and my answers. You might find the questions and their answers a bit surprising. Seattle Dominatrix Ruby Enraylls has the answers to your questions and some tips.

What is your favorite thing to do in a session?

It depends on my connection with the person I’m playing with. Having overlapping interests is important. I’m big on bondage, predicaments and power exchange. I really enjoy mind fucks and getting to be creative. I often tend to get really into a theme for a while. A bit ago it was medical then ADBL, chastity roleplay scenarios, prisoner stuff… it’s always something and my specific interests seem to rotate and shift. I enjoy curating an experience for someone.. The more creative the better. I like longer scenes so I can build up ideas and get to know someone, knowing someone over a longer period of time helps with this as well. Nothing can beat intimate knowledge of the inner workings of someone.

What got you into BDSM and the Femdom lifestyle?

Like many of the people I talk to, I have been kinky for as long as I can remember. If you’ve read my about me, I talk about being kinky when I was pretty young, when it was literally just a game. I don’t see anything wrong with that, although many people I’ve spoken to want to find the reason they are into bdsm. This implies to me that it is something to be fixed when I don’t think that’s true. That’s like saying any preference is inherently wrong. It’s my belief that a homogeneous world is pretty dull, among other things.

But I digress. I’ve always had an interest in Bdsm and the very first adult images I found were femdom related. So it seems normal that I would trend that direction, especially considering that I was raised in a female dominant environment.

Are other people into my fetish?

The shortest answer is yes. I’ve played with many, many people and I can tell you with complete confidence that even if someone hasn’t engaged in your particular fetish, there’s definitely an interest. We live in a kinky world. The biggest barrier to entry is unfortunately, shame.

What do you find attractive in a submissive/slave?

The evil variation of this question is “will you go on a date with me” or worse “can I be your live in slave?” Before asking such questions, consider the one posed above and ask yourself “what do I like most about me?” Personally what I like most about my slaves is that they are considerate, kind and respectful. Every person I notice has a willingness to consider the needs and desires of others and makes an effort to do so. It’s often small things that make the biggest impressions.

Seattle Dominatrix Ruby Enraylls is dressed in black latex with her latex slave in her Seattle BDSM Dungeon where she takes requests for Femdom and mistress sessions

What can I do to have the best session with my Domina?

Communicate! Clearly, honestly and respectfully. Sending a long fantasy and play by play isn’t particularly helpful to be completely honest. Writing out a list of yes’s and no’s, hard and soft limits and any specific things you want to try is a great way to start. I prefer to communicate such things at the beginning of the session unless there is something you think I won’t have or something that will need to be prepped for or negotiated. As we get to know each other more, I find that sometimes planning gets a bit more elaborate and more communication before we meet up is necessary or desired.

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Scheduling System, Rates, Film Days

Seattle dominatrix ruby enraylls leather boots and gloves

New Scheduling System

I’m delighted to announce that I have added a new scheduling system! This system is only available to those who have completed and passed my intake screening form and those who I have seen before whose contact info I recognize. Once you have completed my form, you will get the login to schedule. If your info doesn’t match info I have, you don’t get to book with me. I am strictly only accepting new inquiries through or with the completion of my form.

Rates (Clarification)

Firstly, my contact and rates pages have been combined. If you’ve been watching my advertisements or my lovely dominatrix website lately I’m sure there’s been a little confusion as to what my rates are. Let me first say, sorry for the confusion and here is some clarification-

Balancing face to face time and what an appropriate risk level is during the pandemic has been a little tricky.

I’ve also been surprisingly swamped with inquiries. Fortunately, I’ve found a solution to that problem, if you’ll see the above (new scheduling system.)

During the last year or so I’ve made some incredible improvements to my dungeon, my bdsm equipment and my dungeon furniture. Prior to my pandemic rate change, I hadn’t raised my rates in years. I think that my improvements are astonishing and well worth the price of entry. You will just have to see for yourself.

Now that I have gotten better organization of my calendar and effective time management, I’ve decided to postpone my October raise but add some other offerings. As per usual, keep abreast of my website, I’m always updating it!

Filming Days

I have very much been enjoying filming with other performers, I hope you have enjoyed my work as well! I’ve discussed with several folks about the prospect of filming together so I wanted to make the formal announcement that I’m going to start offering a “filmed session day”. You will be required to sign a standard model release and provide ID so that I can use the footage but you will be rewarded for it.

Film Days available in 4 hour, 6 hour and 8 hour denominations.

Duos and Moresomes

After Sesta/Fosta was announced, I removed mention of all other people from my site. Since I’ve begun filming with other performers I’ve had folks ask about them and I wanted to answer that question: I absolutely do duos. In fact, I love getting to see you and my friends together! If there’s someone you think is fun or cool, ask us!

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Gear Update: Erostek ET312B and Estim 2b

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At long last, another gear update! This time… A shocking one. (So punny..) But seriously, I have added the now discontinued Erostek ET312B and the Estim 2B plus a large collection of addons. Everything from CBT, wartenberg wheels, sounds, probes, butt plugs, clips and more! Are you excited yet?

About the ET312B

Erostek is the king of Estim. Their ET312B has been produced since 1999 and has been beloved by kinksters, reproduced, tinkered with and it is a loss that they are no longer in production. If you have the opportunity to get your hands on one like I did, jump on it. With a little luck they may come back into production in some form but if you’ve wanted one, don’t miss your chance. Erostek offers information and parts for current owners. So they are repairable and reliable.

About the 2B Power Pack

The 2B is the only power unit I have used that compares favorably to the venerable ET312B. The 2B’s smaller form factor makes it a great portable that literally jumps to life when powered by the included AC adapter. 

highly recommend this power unit. Those of you who have been following us know this is the first power unit we’ve ever offered by another manufacturer. The 2B caught me by surprise – in a good way. 

– Erostek.com 

Does this mean the 2B is the new king on the electro scene? You’ll have to be the judge.

Comment and tell me what your favorite estim power box and/or attachments are!

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Dungeon Furniture Upgrades Incoming!

seattle dungeon

As per my dungeon page, I am always upgrading my space and my gear. My latest acquisitions have trended towards the… Niche. Curious about what is incoming? I’m looking forward to the testing and set up! Below are some teaser images! You’re going to have to wait to see them in action. (Are you excited? You should be!)

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