The heart is a very old symbol of love that is used by everyone all over the world. Traditionally, the heart has been chosen in several cultures as the seat of love and feelings. Why the heart was chosen as a symbol of love is not entirely clear. Perhaps because the heart is automatically related to (emotional) life and without the heart (read love) no life is possible. The heartbeat is also influenced by feelings; for example, our heart beats faster when we are in love. The heart likes to be loved. The heart needs love. It is even claimed that love extends life expectancy, while loneliness has the opposite effect. Everyone knows the expression: "He died of a broken heart".