It works pretty well, but the issue I've always had is that the head of the vibrator is about the size of a tennis ball, and my genitalia when I'm wearing some sort of tight underwear is not unlike the shape of a slightly smooshed tennis ball. It's hard to mate those two things together well so that the vibe is hitting the right spot, and it's easy for it to slide off one side or the other. You might say, "Well why not get one of those silicone heads for the vibe that's designed to go over a cock?" That'd be fine if I could maintain a solid erection the entire time I was restrained. (I can't.) Plus you still have the giant body of the vibe that has to go somewhere.
What I've thought about making forever is something that's basically an athletic supporter (cup) with some vibrators attached to it. A cup would be perfect since it's designed exactly to mate with my genitals. So I finally got around to heading down this road, and the first thing I did was grab some vibrators. I found some on Aliexpress that were only like $5.50 USD each, so I got four of them.
Incidentally if you decide to go down this road make sure you look at measurements. A lot of the pictures looked similar but many of the other vibrators were the size of a peanut. The one I ended up getting was about the size of a US C-cell battery, but maybe a bit longer. The site said they were 12V 4300 RPM. They're also waterproof which is a bonus.
So they showed up a few days ago and I immediately had to try them. I had a 12V power supply for some LED light strips that had enough current to run them. I started by just sliding them into my underwear; one down either side of my genitals, and the other two above and below. Then I twisted the ends of the leads together, hooked them up with alligator-clamp test leads and plugged it in. And they're pretty much exactly what I'd hoped. And as long as I've got some decently tight underwear to hold them in, I don't think I need to bother with the whole cup idea.
They're strong enough that they feel great and keep me on the edge where I want to be, but not so much that I need to worry about climaxing. I bought a new timer recently which not only has the normal dozen or so on/off settings, it has an intermittent cycle that you can program down to the second and it'll just repeat forever. So something like 15 sec on/30-60 sec off will probably keep me entertained for as long as I want to be tied.
I'm planning on getting some DC power wires with a standard barrel plug on the end and solder one of those to each vibe. They make some 4 to 1 pigtails for powering things like security cameras. I can connect one of those to the power supply and then just plug in however many vibes I want. (Let's be honest; it'll probably always be all 4.)
