Have any of you actually wanted a cuckold/ENM pregnancy?

Or, simply allowing other men to breed the wife/girlfriend in the confines of a relationship? Essentially, to find a relationship where both partners want the woman to be free to have sex with others and to be free to get pregnant with other men too? I suppose it's more of a stag/vixen type of relationship than a cuckold one, but in my experience, it's super hard to find.