Relationship Expert's Brutally Honest Takes On YOUR Juiciest Confessions
October 7, 2026
AI Summary
5 min readWhen to Stay, When to Go: A Relationship Scientist Weighs In
Dr. Paul Eastwick, a UC Davis professor and leading relationship researcher, joined Liz Moody to field real listeners' stories about how they knew it was time to leave a relationship. Rather than offering simple rules, Eastwick provided nuanced, science-backed frameworks for thinking through one of life's hardest decisions.
The "Same Interests" Trap
A listener wrote that she left her first husband after reading that if you don't like doing the same things on weekends and vacations, there's no point staying together. Eastwick pushed back: "If I lined up a hundred activities and asked you which ones you like doing and I asked your partner the same thing... it's not going to predict all that much about how happy you are." What matters is the subjective sense that you enjoy time together, not the specific activities you share.
He also challenged the idea that partners need to share your top priorities. A man broke up with a woman because he wanted someone extremely athletic and outdoorsy. Eastwick's response: "For most people, they probably have four or five things that they would really enjoy doing with somebody else. And if your partner doesn't fit one or two of those, it's okay to have relationships with other folks where you do those things."
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What you'll learn
- 1 (00:06) **Introduction & Listener Confessions Framework** - Liz introduces the episode's premise: using real listener confessions to explore when it's time to leave a relationship, with relationship researcher Dr. Paul Eastwick.
- 2 (00:39) **The Weekend Compatibility Question** - A listener left her husband after reading that shared weekend/vacation preferences are essential; Dr. Eastwick pushes back on this idea.
- 3 (03:38) **When "Type" Preferences Mask Deeper Issues** - A man broke up with a woman because she wasn't athletic enough; Dr. Eastwick questions whether such rigid preferences are predictive of relationship success.
- 4 (04:46) **Cheating as a Signal of Dissatisfaction** - A listener cheated, felt "free," and later married the affair partner; the question is whether cheating means you're with the wrong person.
- 5 (06:44) **Powerful Thought Experiments for Decision-Making** - A listener knew it was over when she realized she wouldn't want to spend her last year with her partner.
- 6 (07:53) **The Role of Outside Perspectives** - A listener only considered leaving after a mentor told him it was time; the question is whether to trust others' advice.
- 7 (10:12) **When You Don't Like Who You Become** - A listener realized she became controlling and anxious in her relationship, regardless of her own efforts.
+ Full timestamped outline available in the app
Guests on this episode
Show Notes
It can be so hard to figure out when a relationship is working, when you could do better elsewhere, and when it's really over. So today, I thought it would be fun to have you guys write in and share how you decided when it was time to leave a relationship.
I am joined by Dr. Paul Eastwick, one of the leading relationship researchers in the world, a UC Davis professor, and the author of dozens of research papers on how we can choose the best partners for ourselves.
🎧 What you’ll learn:
• The experiment and question that reveals whether your relationship has a future
• Why sharing the same hobbies as your partner matters far less than you think
• The surprising research on whether the urge to cheat means you're with the wrong person
• How to tell if your relationship is the source of your anxiety, or if it's getting a bad rap from the rest of your life
• Why compromising isn't the warning sign everyone says it is
• The positive relationship ingredients science overlooked for decades
• Why bringing your partner into the conversation sooner can be the kindest thing you do
• The truth about staying together for the kids, and what the research actually says
Check out the previous episode of The Liz Moody Podcast discussed today:
“What You THINK You Want In A Partner Is Ruining Your Love Life”
For more from Paul Eastwick:
• Podcast, Love Factually: https://podcasts.apple.com/us/podcast/love-factually/id1766543146
• Book, Bonded by Evolution: https://www.amazon.com/gp/product/0593593987?tag=randohouseinc7986-20
• Instagram: https://www.instagram.com/pauleastwick/
Ready to uplevel every part of your life? Order Liz’s book 100 Ways to Change Your Life: The Science of Leveling Up Health, Happiness, Relationships & Success now!
Connect with Liz on Instagram @lizmoody or online at www.lizmoody.com. Subscribe to the substack by visiting https://lizmoody.substack.com/welcome.Buy our cute sweatshirts, conversation cards, and more at https://shop.lizmoody.com/.
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