Ines Well, I believe that first is the person and then chastity. Probably you could fall in love with a girl that does not wear a belt, however, you can talk with her and maybe she could understand that the right thing is wear it, even probably she will not want do it.
In general I agree with you, but I think it is extremely, extremely unlikely that you find a woman who want to wear a chastity belt for you on accident. I think, if it is that important for him, he should search for a woman who is into belts, too and then see if they want a relationship based of love. A relationship based on the shared interest of chastity belt only can't work, but expecting to find a woman who is into chastity belts without explicitly searching for her is very unrealistic from my point of view.