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Justin J. Lehmiller Ph.d

Justin J. Lehmiller Ph.d

Psychology Today

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What Happens When a Couple Opens Their Relationship?

How opening up a relationship affects life, couple, and sexual satisfaction.

16.04.2026 40

Psychology Today

Justin J. Lehmiller Ph.d

Why Identical Twins Can Have Different Sexual Orientations

Two people may share the same DNA, but don't always have the same sexuality.

30.03.2026 70

Psychology Today

Justin J. Lehmiller Ph.d

The Science-Backed Secret to Long-Term Passion

To keep the spark alive, focus on shared growth.

23.02.2026 100

Psychology Today

Justin J. Lehmiller Ph.d

What Does (and Doesn't) Count as Cheating?

27.08.2025 40

Psychology Today

Justin J. Lehmiller Ph.d

Falling in Love with a Friend Is More Common Than You Think

27.06.2025 90

Psychology Today

Justin J. Lehmiller Ph.d

Does Playing Hard-to-Get Actually Work?

23.05.2025 30

Psychology Today

Justin J. Lehmiller Ph.d

How Do You Keep Passion Alive?

15.04.2025 60

Psychology Today

Justin J. Lehmiller Ph.d

What Counts as Porn? It Depends Who You Ask

25.03.2025 30

Psychology Today

Justin J. Lehmiller Ph.d

How Many Men Have Ever Faked an Orgasm?

25.02.2025 90

Psychology Today

Justin J. Lehmiller Ph.d