I recently discovered that there is a mass market consumer product inspired by medical vibrators used by men with spinal cord injuries. The Hot Octopuss Pulse line of toys have a vibrating plate that can stimulate the glans with user controlled frequency and power. The most powerful Lux models retail for less than 200 US dollars. (Despite the silly name, the content of the manufacturer’s site is restrained and tasteful.)
I purchased a Pulse Solo Lux myself recently. Though I have not trialed it extensively yet, the results thus far have been less than stellar. I still would not discourage others from trying out the product as we know everyone’s experiences with numbness and anhedonia vary widely.
As others have already noted with the Viberect, mechanical stimulation of such a sensitive area can quickly become tiring - I noticed tenderness from one session persists for a day or so afterward. An additional drawback, especially for those in small or shared living arrangements, is that the device is quite loud. I don’t think an uninitiated person is likely to recognize the sound, but still something to keep in mind.
One positive point is ease of maintenance. The entire body of the device is waterproof and lacks any recesses, so cleaning is extremely easy.
In my specific case, I was not able to climax with prolonged use of the device at the highest intensity settings. Response to other forms of stimulation also was not markedly different afterward. It’s possible this perception may shift with repeated use, but I’m frankly a bit too self conscious to really give a sustained effort, at least for now.