I saw an ad for it once when browsing some chastity porn sites:

*CyberLock: The most sophisticated mobile chastity app. Download to your own phone, or connect to someone else's, and you can lock yourself or your man up without any keys or any fuss.*

Turns out 'no keys,' scary as it sounded, was a selling point. No lock to break, no way to cheat, and worst-case scenario, the user could log in from any device. No worries about losing keys.

I was intrigued. I had never used a chastity cage before, nor had I ever dated someone who was into it. But the more I looked into it, the more I realized I could use it to play with my own fantasies. I had fantasized about chastity quite a bit, and had even once bought one, but I caved within a couple of hours. CyberLock - well, the high-end model, anyway - included a feature called 'Fixed Preset.' If you used Fixed Preset, then any time you added couldn't be removed, no matter what. Wow... I mean, I would still have preferred a partner to play this with, but short of that, Fixed Preset was perfect. I couldn't cave. I had to stay straining and frustrated. I shook a little just at the idea. Chastity had always remained in the realm of fantasy. I always jerked off within a few hours. But now I could see what it was really like. The top model was pricey, but I could afford it.

When it arrived, I downloaded the app and browsed all the features. Simple metal tube that snapped closed. No lock or hole. I thought they sent me one a size too small, but it still fit, if a little snugly, and I didn't want to deal with customer service. This model include Alterable Preset and Fixed Preset, as well as four tools: Hot, Cold, Vibrate, and Shock.

Anxious as I was to snap it on and begin aching, I read the instructions carefully. Then I did a Fixed Preset of 12 hours. Seemed like a good start. It asked whether I wanted an open or closed session. Closed meant only I could control it, but Open meant someone within range, who had the app, could claim the session. The instructions said that if I chose Closed, it would be difficult to open it up again, and I would definitely want it to be Open in case I ever got a chastity girlfriend. I shrugged, and left it open.

I tried the four tools. Each one could be done on a scale of 1 to 10. Hot and cold were interesting; kind of reminded me that it was there without really doing much. Although at level 10, cold made me wince and hot kind of burned me. Vibrate served its precise purpose: It teased me. At level 10, it was almost enough to make me cum, though not quite. Shock was exactly what it sounded like: A painful electric shock. I tried it at level 1 and 2. I guess some guys like that, but it wasn't for me.

Those 12 hours were amazing. It's not like it was a long time, but walking around, doing chores, knowing I couldn't touch myself even if I wanted to ... fuck, by the time I got the fucking thing off, after toying with vibrate, I had an earth-shattering orgasm. Listen, I don't have orgasms every 12 hours, but the psychological impact was tremendous. Imagine when I used it for longer!

I used it for a while, enjoying the novelty. I tried different time settings, finding 72 hours was my absolute upper limit; the frustration was way too much and made it impossible to focus on other things. Eventually, it was less exciting, and I only used it every so often from then on. Not constantly, but every month or so, I decided to slap it on for a day or two, when I was thinking a lot about chastity. It always got me off intensely after a day or two of raging blue balls. And the anticipation ... I would always watch the clock on the app, counting the seconds. Even if it wasn't locked for long

One morning, after sleeping in the cage, I woke up to my phone buzzing. Groggily, I reached for my nightstand. Was someone calling me this early in the morning? I looked at the phone and there was a notification from CyberLock. That never happened before. I checked the notification. It just said:

"Session Claimed."

My eyes shot open and I got to my feet. I opened the app. It looked completely different now. All that showed was a lock symbol and a timer, and perhaps most shockingly, the timer showed an hour more than I had remembered. I stared at it, confused. Then, all of a sudden, the timer disappeared, and the words "Time Hidden" appeared.

My heart sunk. I went to the kitchen and paced anxiously. Yes, I left the session open, but who was using this app? Who would have claimed it? A friend? Relative? Neighbor? Is it possible some stranger just passed by, saw the open session, and claimed it, just for the hell of it?

*It's probably just a glitch,* I said to myself. *Don't panic.* I started to dial customer service. And then...

The doorbell rings.