Episode 510: The Science Of Sexual Arousal

June 16, 2026 by Justin Lehmiller

Sex and Psychology Podcast
Sex and Psychology Podcast
Episode 510: The Science Of Sexual Arousal
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A lot of people think that if you’re attracted to someone, arousal should just naturally happen. But it’s not that simple. In this episode, we explore the science of sexual arousal, the many pathways through which desire can emerge, and how stress, trauma, burnout, and major life experiences can reshape our relationship with pleasure.

My guest is Kayna Cassard, a sex therapist, painful sex specialist, certified trauma therapist, and author of the book Arousal, Answered: An Expert’s Guide to Authentic Pleasure and Liberating Sex. Her mission is to help others liberate themselves from outdated sexual scripts and empower them to rewrite their authentic sexual narratives.

Some of the specific topics we explore in this episode include:

  • How can understanding the brain unlock more pleasure?
  • Why is desire more complex than spontaneous vs. responsive?
  • What role do stress, safety, and connection play in arousal?
  • Why is it so hard to stay present during sex?
  • How can becoming more embodied enhance desire?

You can visit Kayna’s website to learn more about her work.

Got a sex question? Send me a podcast voicemail to have it answered on a future episode at speakpipe.com/sexandpsychology.

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Thank you to our sponsors! 

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Credits: Precision Podcasting (Podcast editing) and Shutterstock/Florian (Music). Image created with Canva; photos used with permission of guest.

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Written by
Dr. Justin Lehmiller
Founder & Owner of Sex and Psychology

Dr. Justin Lehmiller is a social psychologist and Research Fellow at The Kinsey Institute. He runs the Sex and Psychology blog and podcast and is author of the popular book Tell Me What You Want. Dr. Lehmiller is an award-winning educator, and a prolific researcher who has published more than 50 academic works.

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