Zap. A quick shock delivered to my balls interrupted me from finally dozing off. It was just enough to wake me but not enough to distract from what was about to happen. There wasn’t much stimulation to be had as a urinal slave but the periodic shocks helped. It reminded me that I still had some feeling left in my balls, despite my cock being locked tight and denied for months.

As a urinal slave I was lucky to find my master. He owns a company that provides portable restrooms. The trailers are usually built with 2 or 3 urinals that can be used at festivals, events, parking lots, anywhere really. They’re all waterless and low maintenance, mainly because the magic happens underneath the floor.

Under the trailer are several valves and locks. Each trailer has one or two long flat trays that slide out. They’re solid and enclosed once shut, they have insulation for noise and even some climate control. Once I lay down there, straps are locked around my arms, wrists, thighs, and ankles. My collar is clamped down and I’m completely immobilized. This is all of course in addition to my normal uniform.

My normal uniform as a urinal slave is quite simple. I’m kept completely naked except for a few select items. First are my ankle and wrist cuffs, these make it easy to secure me to any location. Next is my blindfold hood. This isn’t an ordinary hood though. It has noise canceling headphones that are used to play or speak anything to me. This means I’m typically listening to white noise most of the time and have no clue who is about to use me when. In addition to this, the hood meets my collar which allows my neck to be secured as well. Lastly is my chastity and butt plug. As a urinal slave, I have no need to get hard or cum. I’m kept locked tight and denied so I can focus on being used. My hole is always stuffed with a butt plug that can be remotely vibrated if I’ve been a good urinal.

Once I’m strapped into the trailer tray below, the next part is installing the hookups. This includes a few crucial pieces to ensure I’m maintenance free for however long I’ll be there. First, a new butt plug is inserted that is hollow and connects to a tube. This allows any rare but potential solid waste to pass through. Next a catheter tube feeds through the end of my chastity cage. This allows me to relieve myself as needed and it will flow to a tank for disposal. Lastly, the main line is connected to my mouth. The tube is inserted and locks onto the built in gag of my hood. Though I can move my jaw slightly, I can’t stop the flow or push the tube out. Master can use the valves outside to adjust it slightly and even reroute to one or multiple urinal slaves. I’ve now officially become part of the plumbing.

Lastly is a new feature that master added. He had a slave fall asleep once which caused several problems. To help prevent that, a small metal piece is connected around my balls. Every time the door to the urinal trailer opens, a short shock is delivered. It ensures I’m alert and reminded of my place. The worst part is never knowing if it’s opening for one person or five, are they coming in or going out…

Though I’m already blinded by my hood, it somehow feels more dark once the tray is slid back in. I can ever so slightly feel the motion as I lay in darkness hearing nothing but white noise and unable to move an inch. Once the outer door is shut, nobody would ever know I’m down here.

Suddenly there’s a light rocking and I feel like we’re moving. The trailer could be going anywhere and I’ll never know. After what seems like eternity it feels like the movement has stopped. Some time passes but I know eventually no matter how relaxed I try to be, I’ll feel a zap to the balls and know what’s coming.

Zap! There it is. Someone has opened the door and now it’s only a matter of time. After a minute or so I taste a glob of spit slowly rolling into my mouth. One of the things I’ve learned in my time as a urinal slave is guys tend to spit down the urinal more often than you’d think. It’s become a nice surprise other than the different strengths of piss.

Suddenly a nice hot stream of piss hits my tongue. The first one is always so refreshing and makes my locked cock want to bust out of its cage. I swallow as quickly as I can knowing at any second there could be more. All of a sudden the stream stops and I’m left with nothing but the distant taste or piss left in my mouth. Zap. My body tries to move slightly as my balls are shocked. Was he leaving or was someone else coming in? I have no way of knowing.

I lie there patiently for a bit and all of a sudden when I feel there’s nobody needing me, a zap to the balls gives me hope. A minute or so goes by and then the piss starts to flow. It’s fairly light and clearly this guy has been staying hydrated. I’ll probably be tasting him again soon, it could even be possible he’s the same guy as before. I continue to swallow wondering if he’s some hot jock or not, even though I’d never know the difference. As the stream is starting to slow a zap hits my balls reminding me that there’s more than one urinal. All of a sudden the piss changes from light and refreshing to strong and bitter. This guy is definitely a different one. Without any other options I continue to swallow every last drop. Then I’m zapped twice to the balls just seconds apart, I’m assuming they’ve both left and I try to catch my breath.

Out of nowhere more piss hits my throat. Apparently though they left, someone else has entered. I swallow quickly again and at this point assume I’m the only slave in the trailer based on the quantity or piss flowing through. The piss continues for what seems like forever and finally stops. A minute or so goes by and then I pray the zap means I have a few minutes to relax.

At this point my bladder is starting to get full. It’s fairly hard to release it with such a big plug in my hole but I manage to trickle some piss out of my own cock down the tube. Suddenly a zap to the balls brings it to a screeching halt though. It seems wherever I’m located is starting to get busy. I lay there for what feels like eternity swallowing piss on and off as my balls continue to get zapped every couple minutes. At this point I’m nothing but a piss filter under the floor.

Finally business slows and it seems like the end of the day has approached. The only way for me to tell is dinner time. As a urinal slave I’m fed one meal a day so I stay hungry for piss. It’s completely liquid and flavorless. This is to keep my diet simple and just to deliver the necessary nutrients. However, I don’t need to be wanting food more than piss or getting distracted from my focus, that’s why it’s as bland as possible. A timer clicks on within the trailer and my meal is released down my tube. I swallow the liquid as quickly as possible and then try to get comfortable as my restraints begin to become the only thing I can focus on for the next several hours.

If it was possible to toss and turn all night I would have. Despite being a urinal slave for quite some time it’s still challenging to sleep in such tight restraints with white noise playing and all your holes stuffed. I drift in and out nonetheless and finally get some rest. Eventually I begin to wonder what time it is. I’ll have no indication of morning until someone enters to use me but in the meantime I’ll try and enjoy the calm before the storm. Somehow the second day is always the busiest.

A shock hits my balls and I’m yanked out of sleep and waiting. I almost have to wonder if it was real or in my head. I’m still groggy from dozing off and all of a sudden a nice ripe stream of piss flows down. It must be morning because this one is strong and probably their first of the day. Without any options I swallow it quickly and brace myself for more. Another zap hits my balls and the guy with the strong piss has a friend. He breaks up the stream with a big glob of spit and then it’s more piss. His isn’t as strong as the first guys but it certainly is morning. They both finally finish and must leave together because after one zap all of a sudden it’s back to nothing.

I’m able to release a bit more of my bladder as a short amount of time goes by and then it begins to pick up. It goes from every few minutes to what feels like every 60 seconds a new guy has walked in… I’m in for a long day ahead as a urinal slave.