Might come under devices, sorry if I'm in wrong part. Biggest problem with all devices is they are not chastity in the true sense. Every device I have ever tried, I can A) orgasm in. B) pull out of or even fall off. And C) damn padlocks! Ok padlocks is mostly solved, especially metal devices are pretty unbreakable now (boltcutters don't work anymore lol). But what point is a device if u can cum, or get out of? Imo holy trainer types are closest, just needs a slight adaption and they would be IT.
There will always be some level of personal accountability when it comes with a male chastity device. I personally try to make sure this uncomfortable situation is as comfortable as possible when it comes to a device... and the shame of cheating "the system" to me is no reward...