I used to be the kind of wife who told her husband everything. In fact, when we first got married I really felt like if I didn't tell my husband something that was bothering me, it was somehow failing our relationship. I've since learned that there's a lot of value in, sometimes, keeping my mouth shut. In fact, there are at least eight things I definitely don't tell my husband, and our marriage is more peaceful and stronger for it.
My partner and I got married when we were both in our mid-20s, so we didn't have much baggage coming into our marriage. Still, we told each other very little thing about our past relationships and sexual escapades. And when we tied the knot, I thought I had to tell him every last feeling or insult I thought he had caused or lobbed my way. That, my friends, was a terrible idea. It caused more arguments than we ever really needed to have, especially in the early days of our marriage, and I eventually realized that just because I decided not to fight a particular battle didn't mean I was losing it.
Now my husband knows most of what I do simply because our life is fairly simple. I don't really need to "cue him in," day and night, as we've found a groove and established a schedule that benefits everyone. But there are still things I don't bother to tell him, either because it's not worth the argument or because the world won't end if he never knows.