Quote of the day by Prince Philip continues to be shared because it combines humor with a practical message about marriage and relationships. Prince Philip often spoke in a direct style, and many of his remarks became memorable. One of his best-known quotes says, "When a man opens a car door for his wife, it's either a new car or a new wife." While the statement is meant as a joke, it also highlights how people sometimes stop making thoughtful gestures after many years together. The quote encourages couples to continue showing care, respect and attention throughout their relationship.