As long as it doesn't negatively affect the marriage and the other person may even be somewhat flattered that her spouse is protective over his woman..or which ever. My husband and I are never jealous but occasionally he'll say something about being jealous and I think it's cute. Every once in a while I'll bust his butt about him being the male boss in a female dominated area of his job, we both know it's for joke (the women are his mothers age..haha).