How do I bring up the idea of making my husband permanently pussy free without him getting upset or losing interest so to speak?

So about 5 years ago shortly after being married, he tells me all his fantasies about hotwifes and cucks. Chastity and other kinks.

At first I was not to big on the idea because it was strange he wanted me to cheat on him but after a few years and a few dates I have gotten used to it and though still weird feeling at times it's been fun

For the last year I have dated the same guy and I really his company. I love my husband in all ways, it's just sexually he has never been able to really please me. My boyfriend says I should just make him pussy free. Since my husband can't satisfy me I've been thinking of trying this out.

Any help would be appreciated