My wife wears the key to my chastity cage like that around her neck too. Everyone can see her, our family, our friends, her work colleagues and especially her girlfriends. I'm ashamed but it's so exciting...
I like the way that she re-conditions his mind. Keeping him locked in chastity. Teasing and denying him. Showing him what he will never have. Conditioning him to accept his place as a sexless servant.