HHelen Why wouldn't they? It's always good if she is allowed to have sex with her husband only.
There are benefits layered upon benefits in having a belted wife. From the romantic aspects, to guaranteed faithfulness, to increased household stability, to birth control, to increased safety of the wive! Plus, as I stated many times, my love for such belted woman would eclipse the Sun in its grandeur.
I know I will one day find a woman that's okay with staying belted!
Maybe parents who keep their daughters locked (such as @HHelen) could forward my messages to their offspring. Having a large extended family that values chastity would be great!