This is not just good advice for couples; it is also good advice when dealing with a difficult parent. For example, if the way your father treats your mother upsets you, you might want to try thanking him anytime he does something for your mum (no matter how poorly, or halfhearted).
The following is a love story for children, written in the 19th century by C.S. Lewis’ favourite author, George MacDonald. (I like it because it shows how a man should respect the wishes of a woman.)
This is an edited version. The full version can be found in MacDonald's book At the Back of the North Wind.