Podcast Summary: Something You Should Know
Episode: Are You Revealing Too Much or Not Enough? & How We Absorb Technology
Host: Mike Carruthers
Guests: Leslie John (Harvard Business School), Vanessa Chang (Leonardo/Author)
Release Date: March 12, 2026

Episode Overview

This episode explores two seemingly separate but deeply interconnected topics:

1. The social and psychological science of sharing personal information—are we withholding more than we think, and is oversharing always as risky as it feels?
2. The history of human adaptation to technology—how our bodies, minds, and habits shape and are shaped by inventions from writing to smartphones.

Segment 1: Mindset and Aging (00:34–02:40)

Main Insight:

• Your outlook on aging directly influences your health and lifespan.

Key Points:

• A landmark Yale study shows people with a positive view of aging live, on average, 7.5 years longer than those with a negative outlook—regardless of their actual health or circumstances.
• “If you expect decline, you unconsciously live into it. If you expect growth, you behave differently and your body follows.” —Mike Carruthers (02:00)
• Mindset affects memory, mobility, recovery, and risk of illness.

Segment 2: The (Under)Rated Power of Oversharing, with Leslie John

(02:40–26:23)

Introduction: The Social Risk of Sharing

Mike introduces Leslie John, Harvard Business School professor and author.

• Leslie argues the problem isn't just "TMI—Too Much Information," but also "TLI—Too Little Information."
• “The line between TMI and the bigger danger, in my opinion, TLI... you can go further towards TMI than you think you can in all kinds of contexts.” —Leslie John (00:48, 08:46)

Leslie John’s Research on Disclosure

Revealing is a Skill (05:47)

• We're not born open or closed; revealing is a learnable skill.
• Openness builds trust—by taking a social risk, you signal faith in the other person.

Key Study: Managers' Self-Disclosure (08:46–11:45)

• Managers who admitted common vulnerabilities (like nerves when public speaking) were more trusted and liked than those who avoided sharing any weakness.
• “The line is further than you think... Not saying anything vulnerable was where people trusted [the manager] the least.” —Leslie John (08:46)

What We Regret: Not What We Did, But What We Didn’t Do (11:58–14:49)

• Long-term, 76% of regrets are about things not done—including not sharing feelings.
• “Silence is not neutral. Silence charges interest.” —Leslie John (24:17)
• Bronnie Ware’s palliative care research: 4 of the top 5 end-of-life regrets are about inaction; #3 is not expressing feelings.

Feelings vs. Gossip (18:44–21:40)

• Sharing about others (gossip) erodes trust; sharing your own feelings deeply builds it.
• “Massively we under-share our feelings. But gossip ...that is an overshare. It erodes trust.” —Leslie John (19:10)

Disclosure Hangovers: Are We Really Judged? (11:45, 17:09–18:44)

• The anxiety after sharing (“disclosure hangover”) is mostly imagined—others are usually flattered and feel closer to you.
• “While you're over there with a disclosure hangover, they're like, 'Oh wow, that person was so brave. I'm so flattered.'” —Leslie John (17:58)

Long-Term Relationships & the Danger of Assumption (22:04–24:10)

• In established relationships, we mistakenly believe we know everything, stop sharing, and risk growing apart.
• “Our confidence that we know everything about them outpaces our actual knowledge of them. That’s where the trouble begins.” —Leslie John (22:04)

Takeaway Advice (24:10–25:52)

• Ask: What is the price of not opening up?
• The “mind reading expectation” (expecting others to know what you need without telling them) damages connection.
• “Of course people can’t read each other’s minds...I need to share more.” —Leslie John (24:17)

Segment 3: How We Absorb Technology, with Vanessa Chang

(27:24–48:03)

The Long Relationship Between Humans and Technology

Technology is Not New—But Our Reactions Are Timeless (27:24–29:42)

• Every generation faces “unprecedented” change, but adapting to new tools—from writing to AI—is centuries-old.
• “There’s always frustrations. Zoom, video chat—the future that’s arrived and how mundane it is.” —Vanessa Chang (29:17)

Technology Shapes and Disciplines Our Bodies (29:49–33:02)

• Writing: learned through discipline; extends the mind beyond death.
• “Your body is trained... so you can participate. And because of that, you can have these really profound individual moments of expression.” —Vanessa Chang (31:56)

How Inventions Transform the Human Experience

• Recording the Voice (33:18–36:19): The shift from voices dying with the speaker to voices living on through recordings changes our relationship to identity and privacy. Vocal deep fakes and AI-generated voices both empower and threaten authenticity.
• “When the sound becomes an object, suddenly we can play with it in lots of different ways.” —Vanessa Chang (33:19)

The Smartphone as an Extension of Self (37:51–43:01)

• Devices are designed for the body—PalmPilot, Walkman, MP3 player all “primed” us for constant phone use.
• “The designer...actually walked around with this piece of wood...to see if it would fit into his life.” —Vanessa Chang (38:08)
• Staggering stat: “The estimate was 2,600 [phone touches] a day for the average user...Power users, over 5,000.” —Vanessa Chang (41:08)

Technology, Privacy, and Changing Behaviors (43:01–47:35)

• Private, individual music (Walkman) was not always the goal: features for shared listening or conversation were quickly abandoned in favor of privacy.
• “Those [intercom and dual-headphone] features quickly fell away. So that movement towards privacy ultimately won.” —Vanessa Chang (45:48)

Historical Context: Building Habits and 'Needs' (41:28–43:01)

• The current urge to always “pull my phone out” is the product of decades of prior habits and inventions.
• “All of the behaviors we have...are absolutely primed by technologies in the past.” —Vanessa Chang (43:01)

Notable Quote

• “Your confidence that you know what your partner is thinking and feeling...outpaces your actual knowledge. If we’re more confident than we should be, then we stop asking, we stop sharing, and then we start to grow apart.” —Leslie John (22:04)

Segment 4: Interesting Fact (48:09–49:22)

New Clothes Aren’t Clean Clothes

• New retail garments can carry bacteria, fungi, and especially chemical residues from manufacturing—so always wash before wearing.
• “The risk of serious illness is low, but new doesn’t necessarily mean clean. So before you wear it, wash it.” —Mike Carruthers (48:09)

Timestamps for Highlighted Segments

• 00:48 — Leslie John on TMI vs. TLI
• 08:46 — Disclosure study: Where’s the line?
• 11:58 — Regret and not sharing
• 14:49 — Saying “I love you” is reciprocated 80% of the time
• 17:58 — Disclosure hangovers are mostly self-created
• 19:10 — Gossip as trust erosion
• 22:04 — Long-term relationship risk is under-sharing
• 24:17 — "Silence is not neutral. Silence charges interest."
• 29:17 — Tech frustrations and “mundane” marvels
• 31:56 — Writing as bodily training
• 33:19 — Voice recordings, deepfakes, and identity
• 38:08 — How the PalmPilot was ergonomically designed
• 41:08 — 2,600 phone touches/day for the average person
• 45:48 — Walkman’s privacy evolution

Closing Thoughts

This conversation reframes two fundamental questions:

• In relationships, why does fear of saying too much overshadow the cost of saying too little?
• With technology, how much of our supposedly “unprecedented” present is built on slow, bodily adaptation and invisible habit formation?

Both guests illuminate that what seems like a modern predicament—be it speaking up or putting down the phone—has deep roots in how humans connect, trust, and create meaning.