- Edited
It is a personal decision, but remember, looking back, I'd say I made the wrong decision at the time.
If we exclude all non-consensual use, forget about the actual chastity belts, and just look at the honest, kindly communication between the generations here, it's more often than not very simple: The old folk are telling the young folk to wait for marriage and to watch out for masturbation. That's the experience they want to pass on. The locks and keys and bribery and arguments and resentment all stem from just how strongly the older folk want to pass on their message.
And, if I could go back in time, I'd be telling myself the same thing.