It's permanent in sense of nailing a window shut is permanent. Obviously, even a titanium device is only provisionally "permanent". Everything can be cut with the right tools. However, people in permanent chastity can't be released without major effort - it can't happen on whim or the spur of the moment. The assumption is that release comes only if something changes. Time-locked chastity is just a watered down version of this. They key goes away for a set time, e.g. using a timer safe or online service. You can still get out in an emergency, usually by breaking something. However, the assumption is that release comes only when time is up. In both cases, the chastity is presumed non-negotiable. Whining, pleading, pleasing... none of these are going to help, or if they do there will be major relationship repercussions. Since the chastity is non-negotiable, it no longer provides leverage to the keyholder. In fact, really there is no keyholder. So why's it attractive to people like me, and brave souls like @Minas bitch ? I think we're simply interested in being submissive rather than being dominated, and on some level prefer the drawn out sensuality of being locked to the anticlimax of orgasm. That's what I think. What about you?