Hermit Crabs & Kidney Donations

A spoken-and-transcribed guest-post courtesy of Partner, who caught upwards of seven hermit crabs today: 

Hermit Crab Homes

Hermit crabs grow, but their shells don’t, because hermit crabs don’t grow their shells but find them. When a hermit crab grows too big for a shell, it will find a bigger one. If the bigger one is too big for that hermit crab, it will just hang out near the shell, in the hope that some other hermit crab will come take that bigger shell and leave behind its shell. Because of this, you can get a whole line of hermit crabs: several smaller hermit crabs are waiting to size up their shell. As soon as a bigger hermit crab comes and takes that too-big shell, it will free up a slightly smaller shell, and then another hermit crab could take that slightly smaller shell, etc., trickling down. 

It’s like the kidney donation chain. 

The Kidney Donation Chain

If I wanted to give you my kidney, but you and I are not a match, we’d be out of luck unless there were two other people, one of whom wanted to donate and the other to receive, and we were a reciprocal match so could swap. But generally, there are so many factors required for a kidney to fit that a direct swap is improbable. And they only let something like two or three people form a loop because they want to operate all at once. They’re afraid that, if they do them sequentially, the buddy of the first person to get a kidney will renege on his donation at the end of the loop because his incentive to give is gone. 

Because of this structure, someone donating the kidney without needing a kidney for a friend or family member can change that loop from a loop into a line, which is really mathematically beneficial. And the altruistic donor is just giving away the kidney, no one’s on the hook for getting a kidney back to them, so there’s no risk of someone chickening out. If you choose to donate your kidney, you can kick off a chain that doesn’t just help the one person you are donating your kidney to, but can actually help all the people who exist in that chain, which can be a dozen people or more. 

BBC Earth video on hermit crab shell swaps:
https://www.youtube.com/watch?v=f1dnocPQXDQ

Info on starting a kidney donation chain, including a way to get 5 loved ones to the top of the donation line if they ever need a kidney but you already gave yours away: https://www.kidneyregistry.com/for-donors/start-a-chain/

The Coupon Book

The goal of the game is to make money. You make more money by giving some away, then charging for what stays scarce.

I’m at the second all-inclusive resort of my life. So why do I feel nickel-and-dimed?

(My family comes together for one of these every summer now, which is a lovely experience. I’m having a great time with great people. This feeling is not a particularly negative impact on my experience; I’m simply enjoying the process of analyzing it.) 

It started at check-in, when the concierge handed me a coupon book. He flagged one asterisk: the $50-off coupon for the resort store needs a purchase of at least $100. I laughed and noted I wouldn’t wouldn’t be using that one.

A coupon book. At an all-inclusive. The whole premise of the place is that I already paid, so nothing else carries a price. A coupon is a price dressed up in a faux discount. The coupon book is a store smuggled into a building labeled “no stores allowed”. 

* * *

Once I noticed the first coupon, I couldn’t stop. $50 off a single spa treatment, which made me wonder what a spa treatment costs. I found the menu advertised in the bar and scoffed: treatments start at $229. I can get an excellent massage in the US for half that, and that’s paying US labor prices, not whatever a masseuse earns in central america. 

This is couponing the Bed Bath & Beyond way: float the sticker high, then hand back a slice, so the discount feels like a gift instead of a markup you sidestepped. It’s comparison control, the price game I keep coming back to. Anchor the number at $229 and $50 off reads as generous. Nobody mentions the seller number that should orient their side of the price: their marginal cost of providing the service. 

And the asterisk gives that number away. The same way Chipotle running a 2-for-1 tells you a burrito nets more than 50%, this resort’s $50 off of $100 in the gift shop tells me the same. They’re not discounting into a loss on purpose. If they can afford to give it back, they were charging too much to begin with.

* * *

The second move is the paid upgrade, and it bothers me more, because it breaks the frame on purpose. (At this resort, that’s the “Star Class” upgrade: your room and food become slightly nicer, and you can book Star Class-exclusive dinner tables.) The whole reason to buy an all-inclusive is to delete the transaction. No prices on the menu, no small voice doing math at dinner. If I wanted the experience of paying for something nice, I would have booked a place where I pay for something nice. The upgrade sells me back the exact friction I paid to be rid of.

* * *

So why build it this way? Why sell “everything included,” then spend the week selling more?

My best guess: once everyone holds the same all-inclusive wristband, everyone wants the same scarce things. The 7pm table at the good restaurant. The shaded poolside chairs. Put a few hundred people on identical footing and they start competing, and anywhere people compete over something scarce, there’s money in tilting the field.

So the resort sells you a basic entry ticket. Then it sells weapons to both sides: the upgrade that jumps the dinner queue, the tier that reserves your chair before dawn. What you’re buying, on top of the vacation, is a position in a contest they built.

* * *

I don’t write any of this with a clenched jaw. I came here to stop running the numbers, and on a vacation the only points worth counting are relaxation, enjoyment, and connection. I’m racking those up, surrounded by people I love. I just can’t switch off the part of me that wants to see the machine.

And the machine is simpler than it looks. If something is free, someone finds the version of it that isn’t, and sells you that. If free, then freemium. Even here? Especially here.

You’re Excellent at Friendship

To learn what you’re good at, ask other people. Even better, see what people pay you for.

Earlier today, I told a friend he’s excellent at friendship. He was surprised. He’d never thought of himself that way. He asked how I knew.

Here’s how: we’d just been talking about his bachelor party, a roomful of strong, eccentric personalities, every one a distinct weirdo, many of whom would never otherwise share a room. He gets along beautifully with all of them. Holding that many particular people close at once takes real skill. That skill is friendship. He has it without knowing.

This not-knowing is common. The people who are good at a thing are often the last to know it, because unmeasured skills are tough to compare. We can check the scored ones, though even there the ego cooks the books: somehow every poker player says they’re at the 75th percentile. The scoreless skills, friendship among them, keep no count we can read. So we stay blind to our placing within them.

Take the word “driven.” I have found the people who call themselves driven to be, more often than not, the lazy ones, using the word as a permit: “I’m usually such a hard worker, so I’ve earned a little time off.” The genuinely hard worker, meanwhile, tends to grind precisely because they’re convinced they’re too lazy. Their self-image points the opposite way from the truth. The person who repeatedly calls themselves happy is trying to convince someone, either themselves or others.

So most of us don’t know what we’re good at. We learn from outside, from what others reflect back, because the trait is relative and others judge it better than we do. The blindness runs deeper than skill: we can’t see our own traits, and those same traits decide both what we’re good at and what’s good for us.

This distinction gets even tougher when adding internal emotions: I’ve been turning this over today because two companies interviewed me. One piqued my interest immediately. The other, once I learned the details, is the better fit. It’s almost exactly what I’ve already done, less of a stretch. (“I’ve done all these pieces, just not in this precise combination”, I told them.) Being more drawn to the first isn’t evidence that it’s the better place for me. Being drawn to something is how marketing wins. My interest is one ingredient. When running the ikigai exercise, “what do I love?” is one question out of four. Love is helpful. It isn’t the whole answer. Yes, everyone needs passion. But passion can’t buy food. 

Here, what I’m good at aligns with what’s good for me, but they’re disconnected from what I’m drawn to. 

The thing you’re drawn to and the label you claim are stories about who you are, and the story is selling something. Identity has a downside we rarely count.

When choosing between passion and survival; when choosing between love or life, it is the martyr who chooses love. We reward the martyr with fame and acclaim. Pity they cannot spend it.

Finding My People

Most of success is just showing up. But showing up to the right place… 

Before I moved to New York, I told my Partner that merely by living here, I’d find work. There’s so much economic opportunity in this city that I’d harness some.

One month in, I met a former founder who hired me to ghostwrite a blog post.

Three months later (two weeks ago), a random VC firm pinged me on LinkedIn about a private-markets mixer. I signed up. Yesterday, the organizer texted to make sure I was actually coming.

En route to the club, I noticed that I smelled. So I ducked into a CVS for deodorant. Not a good start.

I entered the club at 3:51pm. The doorman made me take off my hat. Getting worse.

At 4pm, the hosts arrived. They’d expected a room more suited to their needs: an open room, not a big table ringed with chairs. Rough continuation.

Upstairs, another host told me to take off my hat again. Ugh, come on. 

For the next 90 minutes, I met mostly people in wealth management and late-stage investing. Not my areas.

But then! Someone walked in with a pep in his step, someone I immediately pegged as Interesting. I snuck my way over. He grows hydroponic ginseng for a healthy soda company. He sold his last startup, a guitar-amplifier company. Now he wants to bring this healthy soda to the world.

And another! A guy doing video-based sabermetrics for sports other than baseball. And he’s complaining about marketing. These are my people. The ones I can help.

We exchanged emails. I’ll message them about coffee.

All in all, a very successful meeting.

If you show up as your specific self, you’ll meet the people you can actually help. 

Also, I ate 4 lamb lollipops, 2 falafel balls, and 1 small slice of fig pizza. I count that as a win.

Games Played

Me at the bathroom supply store: “Are you salaried or paid on commission?” 

Salesperson: “I’m not going to share that information.” 

Me in my mind: <Commission it is.> 

Flogging & Flourishing

A beautiful experience and the shame that exiles it.

At Burning Man about 10 years ago, two friends asked if I wanted to join them for an intro-to-flogging workshop. I accepted. We trudged across the dusty playa to a tent filled with straps, crosses, benches, and massage tables: the sort of image you’d expect in a BDSM dungeon on TV, except all these were dusty and out in the open, not locked in some basement.

The leader started his talk. He’s a massage therapist, he said, and he thinks of flogging (and BDSM in general) not as an activity about pain, but as a massage with tools. Just as you can create physical experiences of excitement or relaxation or healing in someone’s body using your hands, so too can you create those experiences using tools.

Fair enough.

He asked for a volunteer, asked the volunteer if they had any sensitive areas or pain, and began to demonstrate. His demonstration started slowly: gently bringing blood to the surface, arousing some awareness of the area without any pain. It accelerated: increasing the intensity or the vigor or the speed (sometimes all three at once). He took the volunteer over her edge. She winced. He eased up, comforted her, ensured she felt safe, and continued. The key, he said, was that people have the capacity to go much farther than they believe. Sometimes, we just require a little help.

After the demonstration, an assistant asked us to pair up. The attendees were an odd number, so my group was a group of three: me and my two friends (a man and a woman who were romantically dating and would go on to marry around five years later). First, the man flogged the woman. Then the woman flogged the man. Then I asked the woman if she would like to be my recipient. She agreed. The man interrupted by telling me, “Actually, you’re going to be flogging me.” I did, then we switched, and he flogged me.

I loved it. Adored it. The experience of relaxed sublimity equates only to the perfect calm felt under a heavy blanket or, I presume, a cattle squeeze chute. If you’ve ever loved a hot sauna or a vigorous workout or the endorphins of a long run, you’ll probably like an expert flogging.

Most people don’t talk about this experience. When a BDSM-inspired scene comes on the TV, they avert their eyes or switch channels. We shame kink and the people who like it. No one who has ever been flogged could get elected president.

That makes me sad. Very sad. It was a beautiful experience with wonderful people, the sort of deep and connective touch we share too infrequently.

Thinking about that experience prompts a sad longing in me: the sort one feels when recalling a long-forgotten friend: our life paths diverged and a decade passed, but I would like to snuggle up with them again.

The $20 Locker

Even when this city smacks me, I still see its beauty. 

I love New York’s reasonableness. 

Today I visited a Yankees game. The metal detector dinged on me when I passed. The bag inspector told me I can’t take a laptop inside. He summoned his teammate. His teammate pointed me to a business across the street. He said, “There’s lockers right across the street. They’re not affiliated with us but people use them all the time. When you come back, tell the security and they’ll let you skip the line.” I asked his name. He said Anthony.

The security guards moved the barriers as I shortcutted back through the zigzagging line. I sped across the street. Inside, the worker charged me $20 and ushered me to the back where the lockers live. I placed my laptop inside, pocketed the key, and told him “okay” when he said the locker rental ends 30 minutes after the game. I asked him his name. His coworker said “Ahmed”. He repeated “Ahmed.”

I spent $25 on the Yankees ticket. On one hand, $20 is expensive. On the other hand, the policies are reasonable at every step of the way. Can policy easily distinguish between a laptop and a recording device? Perhaps not. Is this policy public on their website? Yes. Did I check? No, but I could have and that’s my fault. Is there a reasonable solution to this problem? Yes, and it’s not $100 when it very well could be.

When I returned, I told the security guards that I had visited the lockers and Anthony told me to skip the line. My ticket buzzed in, and I retrieved my limited-edition Yankees soccer jersey. For which I paid an additional $10 over the cost of normal tickets. Not because I care about the jersey, but because my father was in town, and he’s always wanted to visit Yankee Stadium. 

Money can’t buy happiness, but it sure can buy the ingredients

Lost and Found

To win, be kind. To be kind, break the rules.

I twice lost faith in humanity today. Once, I got it back. The rules cost my faith. People breaking them gave it back. 

Three airport snippets and a meander: 

1. The bag with no status (lost #1)

At Houston Hobby Airport, I entered my information into my airline’s bag-check kiosk. It told me to see an agent. I approached one at an empty desk. She asked if I had status. I said the machine sent me to you. She asked if I had status. I said no. She told me to go to the info desk around the corner. I told her the kiosk sent me to her. She asked again if I had status. I have the right credit card and a bunch of points, so I shrugged and said yes. She asked what I needed. I said I’d like to check a bag. She checked the bag. Then she told me I didn’t have status, so next time I’d have to go to the other desk. Her questioning about my status took longer than the bag check, and it ultimately didn’t matter. The rules may be dumb. But at least they’re poorly enforced. 

2. Carousel 5 says Denver (lost #2)

Landing at LGA, I went to carousel 5, where the flight attendants said our bags would be. The sign over it said “Denver.” I had flown from Houston. Houston is not Denver. I asked the agent standing there. He said all the Houston bags were out; if mine wasn’t, I should go to the office. I went to the office. I gave the office agent my flight number. She asked for my claim check. I told her I’d left it on the plane. She tutted, found my information anyway, and told me to go back to the carousel. I went back. My bag was there. The agent at the carousel told me he’d tried to shout for me to come back the moment he realized he’d been wrong. He might have been wrong. But at least he tried to fix it, however poorly. 

3. The green bag (regained)

When the plane landed, the woman beside me turned around and said, “My bag’s in the overhead of row 13, five rows back. Green bag. Could you pass it up?” And people did. A wheely bag, no less. At least 6 strangers joined the mission. Great move. I’m surprised it worked. Well played. 

Keeping the Faith

In downtown Houston, I yelled “Praise the Lord!” Two women on the street ahead of me turned around. In New York, where I live, and Chicago, where I’d spent the last 5 days, strangers don’t look at crazy people. In Houston they do. Maybe Houston keeps its crazy people off the street. In 24 hours downtown, I didn’t see any.

I wondered if Houston just removes them. I looked it up: it’s a mix. Houston housed a lot of its homeless, Texas bans public camping, and a city built for cars has fewer sidewalks to be seen on anyway.

About 18 hours later, I boarded a Houston tram. A man with wild eyes came to the door, clasped his hands, and started begging a being only he could see. No one moved away from him. Back home we’d have given him a wide berth. Here, the crowd understands him.

Houston gives a pass for praying.

Why Do People Live Here?

To win, position well. To position well, realize it’s a choice. 

“Why do people live here?”

It’s a common refrain when I travel. And I travel a lot.

Between 2018 and 2025, I lived in a van, driving around the U.S. and Canada. For 4 months in 2022, I lived in Australia, New Zealand, Japan, Indonesia, and South Korea. And most places make absolutely no sense to me.

New Orleans, New York, San Francisco: I get. Austin, Seoul, Paris, Tokyo: totally. But Chicago? Kansas City? Cleveland? Dallas and Houston? Those tiny towns in Nevada and Colorado and Oregon with more elevation than people?

I’m in Chicago for a friend’s wedding. A surprise thunderstorm shook our windows. Two years ago when I visited, I heard a siren. I asked my friend: “What’s that siren for?” He said it’s a weather warning: we were about to be cold enough to be deadly.

The trains run above ground (terribly noisy), and most don’t even run all night. The weather is always either too hot or too cold. The theater and art are good, but not as good as New York or L.A. The food is tasty, but overwhelmingly unhealthy. Maybe it’s the sports?

I don’t buy that most people intentionally choose where to live based on their values and preferences.

Where & why? 

Ask people why they live where they live (I do, constantly) and most people give one of 4 answers:

  1. They were born there. (This is Partner’s most frequent response when I pose the question.)
  2. Work or school took them there.
  3. A lover took them there.
  4. It’s the nearest city to where they were born. (Partner grew up in the “big city” for her area, because it had a Walmart. This “big city”: 16,000 people.)

Who’s the actor here? 

Every answer describes something that happened to the person. Born there: the game placed you. Work took you: the company (or admissions committee) chose. A lover took you: the lover chose (or their company did). Nearest city: the game placed you, plus a radius.

Where you live is one of the biggest decisions in your life. It decides your environment, your friends, your culture, your wages, your rent, and your weekends. And it’s a rare big game where most players never even realize they’re playing. The board hands them an opening setup, and they just accept it.

I can count on one hand the friends who chose their place to live by auditioning and deciding.

Reality & possibility

How many people decide where to go? Between 18 and 30, do you explore while you can (no mortgage, no kids, career still portable)? After your kids leave home, do you think about moving?

Money, visas, family gravity: there are good reasons to stay where you live. But a lot of it strikes me as activation energy. You’re a distinct person with individual tastes. And you just happen to have been born in exactly the right place? 

I’ll take the other side of that bet.

French Security: Worse Than Nothing

Whatever they’re trying to do, they’re failing.

French security sucks. It’s worse than nothing. At least nothing wouldn’t delay tourists.

I approach the metal detector. I hand the officer my backpack. I walk through the detector. He hands me my backpack. Sounds like a normal security process. Except he never looked inside my bag.

Same thing yesterday at the Paris catacombs: at the end, a man seated at a desk with a sign saying open your bags so we can ensure you’re not stealing bones. But he doesn’t open your bags. He doesn’t even wave you on. He just plays on his phone.

Three months ago at a Parisian rugby match: the security officers pat down every entrant. Partner stayed in my line. The officer gestured her to a line with a female agent. Partner walked past him. He let her go.

At Orly Airport, you must navigate through all of the stanchions in sequence, even if the line is 0 people. An extra 60 meters of walking per person. One white-haired woman ducked under the rope. The officers yelled at her. She said, “I’m old, it’s hard to walk!” They demanded she go back.

The Louvre was heisted last October. Has nothing changed? Do none of the workers know the point of their jobs? Do none of them believe in their work? Are they too snoozy from the fondue lunch? (Author’s note: fondue is Swiss. But it does make me snoozy.)

What game is this?

The goal of the game is to win. I say that a lot. Sometimes too much. The goal of the game is to win; you win by doing X. But it’s pretty fundamental: if you’re not trying to win, what are you doing?

Sometimes the goal is different. Sometimes it’s to not-lose. Sometimes it’s to survive. Sometimes it’s to tie. But this security bullshit? Whatever it is, it’s not achieving it.

Even some contrived goal, like “create a specific form of job stability for a certain number of people in France without disrupting the general French living and working systems”, couldn’t you do that better? And that’s already super contrived.

The best rebuttal: fake security still deters. Which is fair. True. Like the faux eyes on the wings of a moth, the mere existence of security may prevent me from attempting to sneak a gun into the [insert grand French monument].

But fake security works when it appears real. If the moth has a sign saying “These are just mock eyes; I’m actually a helpless moth, teehee”, that bug is getting nommed. And today, at the Palais de Justice, a guard waves visitors through a body scanner. The alarm went off on the visitor behind me. The guard ignored it, clicked “Ok,” and waved the woman through. You can’t advertise the fakeness! Bluffing is one thing! This is bluffing while turning your cards face up!

Even I get it!

I don’t like security. I’m fully anti-TSA. Considering the rate of deaths by terrorist attack vs the rate of deaths by automobile crashes, I’m even pro-shrug-it-off re 9/11.

But even I understand the point of security. I get why we have it. I just think it’s dumb.

This version of security is the worst version! Not only does it have no impact; it also wastes people’s time! What the hell are you doing, France?!

Do you want to get invaded by the Germans for the fourth time in 160 years? Because you’re sure acting like it!

Cone-Eyes

The goal of medicine should be optimal health. You can achieve optimal health through all sorts of pathways.

Tomorrow, they will slice into my eye (graphic representation). I’ve been eagerly awaiting this day for years.

Fifteen years ago, I learned I have keratoconus, a degenerative eye disease that prompted my sister to nickname me “cone-eyes.”

I first wore glasses at ~12, contacts at ~15. Hated both. The etiology is unclear: maybe the growth plates that jammed in my cheeks as a child; maybe eye-rubbing caused the mis-shape; maybe the mis-shape caused the eye-rubbing. By the end of one’s twenties, the cone generally stabilizes.

Most people avoid elective medical interventions. As my mother likes to say: “You only get one body.” That logic explains why most people stop at the first reasonable doctor, take the standard recommendation, and live with whatever they’ve been handed.

I know at least three ways to play this game better. You can hire the world’s best, every time (expensive, not always available). You can take what’s offered, set low expectations, and hope (cheap, sometimes works). Or you can attack the doctors until you find one who doesn’t buckle. 

I do the third.

For my eyes, one optometrist wanted me to harden my corneas. Standard of care. I declined for my case. Another doctor, in southwestern Spain, wanted to harden them and then install hard plastic lenses. Closer.

Now, in Paris, I’ve found the Center for Keratoconus and the Cornea. The practice literally says “keratoconus” in its name. This specific surgeon looks at eyes like mine all day, every day. 700 of these surgeries; 0 major complications. Of the ~2 million performed worldwide, the number who have gone blind doesn’t appear in the literature. I believe it’s either 0 or close to it.

The risks:

  • The lens rotates (a second procedure is then needed to re-seat it).
  • If my vision deteriorates, I will need to replace the lenses. (The lenses won’t cause this deterioration: it’s just a natural occurrence for some people as they age.) 
  • A punch to the eye becomes a much bigger problem.
  • Worse night vision.
  • Infection (very unlikely with proper care).

The benefits:

  • Perfect vision, no glasses.
  • Perfect peripheral vision. Today, to look at something off the edge of my vision, I turn my whole head. The edges of my glasses cap my field. After tomorrow, just my eyes move.
  • Better at sports.
  • A weirder benefit: I’m less anxious without glasses. Legally blind without them, but calmer. I don’t know why. After tomorrow, I won’t have to choose.

I already spend most of my life attempting not to be eye-gouged. After tomorrow, that preference intensifies. In exchange, the head-swivel stops.

Today, walking through the park, I removed my glasses and looked at them. Despite the humorous engraving on the side[1], I’ve never liked them. I hope tomorrow evening to jump up and down on them in glee.

I feel nervous. That’s why the surgeon gave me xanax. That, and he’ll be operating on my eyes while I’m still using them. 

Will it go well? We’ll see, I hope. 

[1] It reads “HURRR DURRR !!!”