Male Chastity Device

A man's wife locks him in a chastity device and slowly increases her control over him with humiliation and eventually torture.
“Sweetie, is it okay if we talk?”
She replied “Of course, honey, what is on your mind?” I love how each of us always stops whatever we are doing when the other enters the room.
I asked “Why did you put this on me?”
She replied “Because I want you to be a good boy.”
I said “What do you mean ‘a good boy’?”
She said “Be a good boy and get me a glass of water.”
I was puzzled. She didn’t need to demean me. I am always glad to get her water or whatever else she wants. If this is being a good boy, then she already had that.
I fetched a glass of water and when I returned I said “Is this being ‘a good boy’?”
She said “Kneel.”