Psychology says people who say 'please' and 'thank you' without thinking twice usually learned it so early and so thoroughly that politeness stopped being manners and became something closer to instinct, like breathing out before breathing in

I said thank you to an ATM last week. Out loud. In a bank lobby in Bangkok, to a machine, which had just handed me my own money after a small administrative pause. Nobody heard me except possibly the security guard, who has seen worse.

That was the moment I got curious about it. I didn’t decide to say it. There was no gap between the money arriving and the words leaving. My reflex fired before my thought did, which is a strange thing to notice about your own mouth.

Turns out this is the entire point of please and thank you. They were never meant to be decisions.

You were drilled, and you were drilled young

Here’s the part I find funny. When researchers actually watched kids in the wild, they found children hardly ever produce a thank you on their own. In one classic study an assistant walked into a playroom carrying a gift, and spontaneous thanking was the rarest of the three routines they tracked. Parents then prompted, heavily, and the kids complied.

One detail stuck with me. Not a single child rephrased it. Nobody said “thanks a lot” or “that’s really nice of you.” They repeated the adult’s exact words back, like a password.

Which is more or less what it is. Linguists who study this call these phrases unanalysed chunks, lumps of language you can operate long before you understand them. Same reason toddlers wave bye-bye with no concept of departure. Same reason a four-year-old says trick or treat holding no theory of tricks, or treats.

So if please leaves your mouth without a thought attached, that isn’t a character trait you built. Somebody stood over you at a birthday party asking “what’s the magic word” roughly nine hundred times until the thing welded shut.

Automatic doesn’t mean hollow

Let me defend the reflex for a second, because there’s a lazy take going around that automatic politeness is somehow fake politeness.

Habit researchers have something useful here. When people run a well-worn habit, their minds are usually somewhere else entirely, busy with unrelated things while the behaviour executes itself. That isn’t a bug. That’s what makes a habit worth having. You don’t want to spend conscious willpower on thanking a barista.

I ran restaurants for about a decade before I sold up, and I’ll tell you what my floor staff noticed. Not the customers who performed warmth. Guests who said “please” to a server without looking up from their phone were reliably easier to work for than the ones who made hard eye contact and delivered a speech about how much they appreciated everybody. Reflex beat performance every time, mostly because reflex wasn’t angling for anything back.

Where the reflex quietly fails you

Now the twist, and it’s a good one.

A team of linguists recorded ordinary interactions across eight languages on five continents, zeroing in on moments where one person asked another for something and got it. Spoken thanks turned out to be remarkably rare in those everyday exchanges. Not absent. Just rare. Their reading was that among people who live and work closely together, reciprocity runs on an unspoken sense of who owes what. You don’t thank your brother for passing the salt, because the salt was never in question.

Read that back and you’ll spot the problem.

Reflexive politeness is stranger technology. It’s built for the edges of your social world: the barista, the driver, the ATM. Which means people sitting at the dead centre of your life, the ones actually carrying things for you, get the least of it. Not because you value them less. Because the machinery was never pointed at them in the first place.

I audited myself on this and the results were unflattering. Twenty polite exchanges before lunch, easily. Motorbike guy, coffee guy, building security, a stranger holding a lift. All of them handled beautifully by a system I installed before I could read. The one person who had done something genuinely inconvenient for me that morning got nothing, because she isn’t a stranger and the software doesn’t run on her.

The version that actually lands

Good news is the fix is embarrassingly small, and we all dodge it for the same silly reason.

Researchers had people write genuine letters of thanks, then predict how it would go down. Writers got it wrong in every direction. They badly underestimated how surprised and how happy the recipient would feel, and they overestimated how awkward the whole business would be. That expected awkwardness was the thing stopping people bothering at all.

So we sit on the good version, braced for a cringe that never arrives.

Here’s the only practical thing I’d offer. Leave the reflex alone, it’s doing fine work. But every so often, attach a reason. “Thanks” is a chunk. “Thanks for covering me on Thursday, I noticed, and it mattered” is a sentence, and sentences need a person present while they’re being built.

One a week is plenty. Aim it at someone who has quietly stopped expecting it.

My ATM can go without.