I have a long term play partner who I key hold for as he struggles with keeping his hands off it. We met when he was newly 18 and he visited a kink event and I can tell you that night opened his eyes!
As I got to know him I found that he was addicted to porn and could not stop playing with himself, and would wank to the point of ejaculation up to 10 times a day. He was failing uni because he would play with himself instead of study.
Chastity between me and my friends and toys doesn’t always fit. Between me and my partner and subby I only like chastity as a punishment, because I much prefer milking the life out of him then forcing him to make more under threat of punishment. That makes men weaker than not being able to cum at all in my experience.
But with this guy, we spoke and arranged for him to spend a long weekend with me and he agreed that I would lock him up cold turkey when he arrived and that would be it. He cried. He begged. He didn’t sleep the first 2 nights. Then we agreed on set periods for being locked, being unlocked, when he can take it off to shower or for sports. How I could trust him to only play with himself a *reasonable* amount of times (the goal was not total abstinence, just enough that he could function in society without being preoccupied with his right hand).
He is mid 20’s now and is locked most of the time. He masturbates between 1 and 2 times a month depending on factors including his behaviour. I still have the keys, but it’s not about being mean and strict or outright denial anymore. It’s about keeping him accountable. I have blocked porn on all of his devices and he is never allowed to watch it.
His respect for women has improved a lot and even his parents and family have told me (I was invited to a family birthday as his friend. They do not know any more than that and they shouldn’t know any more than that) that he is more focused and well behaved since knowing me. He was a bit off the rails as a teen. Not uncommon but he was probably going to end up locked up chasing a thrill and doing something stupid (not sexual misbehaviour, he was also a risk taker and would speed when driving and drive dangerous and other things like that) if I didn’t lock him up.
There have been some logistics to the arrangement that mean it still can’t be “true 24/7” and only unlocked for cleaning, some logistics have been ironed out.