But the truth is that man and woman were not designed to spend twenty-four hours a day in each other’s company. What underpins most successful marriages is the knowledge that irritation, if it arises, will only be short-lived since you will soon have an eight-hour break, at least, from the perpetrator because he or she will have gone out to work while you can bask in the blissful mental privacy of having the dwelling to yourself and thereby build up the reserves of good nature which will allow you to greet your partner’s return from the coal face with genuine enthusiasm.