Some men find it very erotic to give control of their orgasm to their partner, and some women find it very erotic to take this check and be the key fob. Contrary to the image it can inspire a woman locked her husband cock and throw away the key, chastity is actually a means to increase sexual arousal for both submission caged and the holder key.
Some men find the moments before orgasm to be very erotic, and let the orgasm, as enjoyable as it is, means these very erotic feelings dissipate. They like to stay in this area as long as possible. Chastity is a way to stay in this area for an extended period of time.
Health and mental well-being a priority of course. The device is removed from time to time for cleaning and inspection, and an orgasm, either ruined or not is encouraged at least a month for prostate health.
Being locked and knowing they will not be allowed to release the man allowed to focus on pleasing his woman during sex. Some men find it very erotic to be able to give their wives and repeated orgasms know they can not, in a moment of weakness, orgasm, and at the end of playing time.
Some women love their partners in chastity before leaving on a business trip to prevent masturbation. Then send them a lot of Sext knowing they can not do anything about it. They know that their husbands will be very willing to meet sexually, or in a way really, when they come back.
I would not say the woman’s husband locked in a chastity device because she does not trust him. Games like this require a lot of trust and communication.
Locking your husband in chastity opens dialogue about desire and encourage each partner to discuss when, how, how often they want pleasure, and what they like.
For a woman who wants to feminize her husband submitted, it can use a chastity to design accent that is subject to and must find its pleasures (and free) in the dedicated pursuit to become a better more completely feminized sissy fetish.
For sissy, there is a physiological impact, constantly reminding him of his docility and submission, lead him to find erotic pleasure almost exclusively and humble themselves in his service to it as an ultra feminized male effeminate. If allowed, this can be combined with other sissy training missions and be very effective in helping your sissy be always diligent in his anal training in the hope of reaching a “sissygasm” on a regular basis. There is nothing more deliciously humiliating for a sissy to have an orgasm anally penetrated.