The old age love between couples is owing to long association and mutual adjustment that happened in a long period.
An oldie has another advantage. He can romance with a woman even twenty years younger unlike a youngster. A fifty year old may romance a twenty years girl, approximately thirty years younger. How can a thirty years old man romance thus. See the romance history of Devanand, Dilip Kumar and Aamitabh.
This is bad combination of couples. The relationship is unhealthy. Wise men should not spoil life of young but silly girls. They should instead make them understand like a father.
Any ways, we couple we all were discussing are old married couples. The love can only be true and faithful in any age between married couples.