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If you have ever fallen in love, you probably remember the intensity of the longing and desire that you felt for the object of your affection.

The breathless anticipation of seeing each other, wanting the moments together to last forever.

For most of us, that passionate intensity fades over time.

Few people celebrate their 10th or 20th Valentine's Day

together with the same enthusiasm that they did their first. But some couples remain deeply and

passionately in love even after decades of marriage. What is it that sets those relationships

apart? What makes love like that last?

Are some couples just lucky or are there things that any couple can do to sustain love or

rekindle it in a long-term relationship?

What does science say about the secrets of everlasting love?

Welcome to Speaking of Psychology, the flagship podcast of the American Psychological

Association that examines the links between psychological science and everyday life. I'm Kim Mills.

Our guest today is Dr. Arthur Aaron, a professor of psychology at Stony Brook University

in New York. Dr. Aaron has spent decades studying how people develop and maintain close relationships,

particularly romantic relationships.

He developed the self-expansion model of relationships, which posits that one main motivation

...