love is univesally measured by the degree of affection...and in a man's life, his affection varies in degree from the moment of childhood to old age..

during his childhood he loves his parents, brothers and sisters...as he becomes a teenager, his affection shifts to his friends.. as he enters manhood, his affection shifts to his girlfriend...

when he gets married, he tend to forget his parents, brothers and sisters, and shift all his affection to his fresh wife...when they have children, his affection shifts to the children (and mistress if there is any)... when the children enters adulthood, he shifts his affection back to his wife until either of them dies...

...this is a fact of life that all of us must learn to live with...