It’s important to have a good coffee cup.My husband, Peter, makes the coffee, and has since we were married. We will be celebrating nine years of marriage this spring, so you might not be surprised to hear that I no longer remember how to make coffee. This is called “learned helplessness” in psychology circles, and it is certainly true in my case. Peter makes the coffee, and I drink it. This seems to me like a fair division of labor. And having the proper cup is essential.I am reminded of this every time I return to Mexico, because I do ...