Guess it depends on the motivation of both parties involved.
I am the more emotional and sexual more needy one in our relationship. I used to try to push my girlfriend whenever I felt the urge. Getting grumpy and moody when she wasn't in the mood.
One day she said, when I didn't want to stop, she'll put me in a chastity belt if I don't let her watch TV in peace right now. I made a snarky comment and just cuddled up to her.
A few days later she approached this topic again. This time just casually showing me a picture of one on her phone while we were snuggled up on the couch.
I jumped up furious and shouted a few things at her. The next morning, after a sleepless night I got up early and researched the internet myself. I made breakfast for her in bed and we talked.
I agreed, I would wear one, if she wears one too. Didn't seem fair to me to be the only one.
The basic rule at this point was, we would always have to were it when and as long as the other has to wear it
I was hoping that would mean, she wouldn't put me into that thing on a wimp, as it would mean she has to endure one as well at the same time.
Well, it kinda worked like that in the beginning. But then she found excuses why she can't wear hers or has to be released earlier than me. I am a bit of a pushover and overtime she hardly wore hers, while mine just barely came off anymore.
To be fair, I did not mind and as mentioned in another thread, overtime actually felt much calmer and safer wearing it. Although there are times I bang with the fist on it and want nothing more than for it disappear forever. And yet feel naked now when I am on a "holiday".
Long story short, I think in every relationship are two sets of emotions. A chastity belt is something very powerful in my view that really screws with your emotions. If one is just warring it to do the partner a favour, it might emplify other things. At least I think it would strain our relationship, if I would really hate it and just do it because I want to please Ann.