This little phrase helps most of us end an argument or potential squabble. In most cases, we really don't want to actually "talk about it later." We never want to talk about it. Putting off the possibility of a blow up gives us some time to emphasize the uselessness of arguing over something so minute. Although it's a potent tool in a man's arsenal, we need to make sure not to use it too often, or else the underlying motives will become apparent.