I have been asked this a lot, the answer is there is no simple answer, as a married couple you should be able to share anything and everything, but just because you do does not mean your spouse will go along with it, do not limit this reaction to cat fights . If your going to express your interest it is best to 1) not include her as being in the fight, why? Suggesting you want her to fight suggests you want to see her hurt, let’s face facts it’s not everyone and for 2 women to fight means a lot of damage win or lose. 2) if you do express the interest tone it down to “ friendly rule supervised competition) it still may not go over well but she might be less likely to roll her eyes or be offended you want her to get scratched and punched, suggesting “ competition with rules for safety” at the very least might let her ponder it. Lastly never over press the issue just like any adult fetish/ hobby it’s not for everyone . Oh and if you do express it or want to ask her what her fetish is first, show interest in her it goes a longer way then being all about you .