I think I might be a talented sex toy designer, (or maybe not.)
I've got an idea for a way to improve the metal anal-ball-cock-ring toy. The intense pleasure of wearing one results in large part from the squeeze it applies to the prostate simultaneously through the front wall of the rectum and the taint. Also, the cock ring might be more pleasurable than a normal one because of the inward force applied to it by the pull of the anal section.
The angle between the two metal segments, the one up to the anal ball, and the one up to the cock ring, is critical. I bought one of these toys that had too great an angle and thus failed to apply much of a squeeze on my prostate. I reduced the angle quite a bit by clamping the toy in a vice, heating it with a propane torch until it was red hot, and hitting it with a hammer.
I overdid it so it became almost impossible to put on and painful to wear after two hours or so. I had to unscrew the ball and remove it to get the my cock and balls though the ring, and that was still difficult. Then to get the ball back on I had to bend sharply at the waist and pull the threaded metal rod away from my taint to have room to screw the ball back on. To get the ball inserted, I had to stay bent over sharply and pull the ball down and back with pretty good force to get the ball over my anus. Once the ball was in, I was really locked up tightly. As I slowly straightened up at the waist, the pleasure from the squeeze on my prostate from the front and back became amazingly intense. I was instantly dripping prostate fluid (precum.) I couldn't resist masturbating, and in seconds, despite my attempts to extend the pleasure, I was past the point of no return.
When I put on the thing the next time, I resisted masturbating, but it was all I could think of for an hour before I had to give in to the intense urge to cum. I left it on for another hour or two, but the cock ring was becoming painful and I had to take it off.
So here's my new toy idea. Make one of these toys just like the ones now, but replace the fixed angle weld or bend between the anal-ball segment and the cock-ring segment with a spring loaded hinge (preferably with adjustable spring force.) When the toy is not in use, the anal ball and the cock ring close together kind of like a clothes pin clamps itself closed. To put the toy on, you have to pull the ball section and the ring section apart, put your equipment through the ring, insert the ball into you rectum, and just let go. I think the prostate squeeze might be orgasmic. This new toy might become a hit, or maybe it would flop because it's too scary and difficult to put on.