An online Bull wanted to have me in a cage. I had never considered it before like you. I know another cuck who has spent a lot of time caged, he's very sub, and says being caged helps focus him on service to his wife and concentrating on pleasing her and any bulls. It depends on how sub you are, it doesn't hurt to try anything I guess.
I never thought about it before, lately I have been wondering what it's like being dominated by her Bull to such a degree as to let him keep me caged for long periods, that sounds very intense to me, to not even be able to get a hardon.