You’re 20 minutes out from your meeting, coffee in one hand, boarding pass in the other. The woman across the aisle from you is about to give a presentation on the next leg of your trip, and there is a smear of lipstick on her jaw that she has not noticed. Your mouth opens. It closes. The moment passes.
That half-second of hesitation is more common than you’d think — and the research on it is genuinely funny.
In one field experiment, 155 people acknowledged that they had noticed a mark on a researcher’s face. Four of them actually told her. That’s about 2.6%. The other 151 saw it, thought about it, and chose to keep scrolling.
What the researchers found
Nicole Abi-Esber, Jennifer Abel, Juliana Schroeder, and Francesca Gino ran five experiments with 1,984 participants, published in the Journal of Personality and Social Psychology, to figure out how much people want constructive feedback and how well other people predict it. The short version: we consistently underestimate how much the other person wanted to hear it.
The scenarios covered everything from small, instantly fixable problems — food on someone’s face, a rip in the pants, a typo before a big presentation — to feedback with much bigger consequences. And the gap didn’t shrink as the stakes got higher. The more consequential the feedback, the more people doubted whether it would be welcome.
So we aren’t just hesitating over the spinach between someone’s teeth. We’re also staying quiet about the thing that would have genuinely saved them.
Why we stay quiet
It’s because our brains run the awkwardness simulation first. If I notice something embarrassing about you, I immediately imagine the aftermath: will you cringe, will it get weird, will you think I’m criticizing you? Those worries are all about what happens after I speak.
Now flip it around. You walk around for 40 minutes with food between your front teeth, smile for a few photos, talk to a handful of people, and find out in a bathroom mirror. You’re not sitting there thinking, “Great, everyone shielded me from five seconds of embarrassment.” You’re wondering why nobody said a word.
The researchers tested the fix, and it’s disarmingly simple: make people look at the situation from the recipient’s side. Just one question — if you were this person, would you want to be told? — narrowed the gap. I like that better than memorizing etiquette rules for ten different embarrassing situations.
The spotlight effect is working on you too
Here’s the part that made me laugh out loud in an airport lounge: when you’re the one with the problem, you overestimate how badly it looks and how many people saw it.
In studies published in 2001, Kenneth Savitsky, Nicholas Epley, and Thomas Gilovich found that people expected others to judge their embarrassing mistakes much more harshly than observers actually did. And the classic spotlight effect research — where participants wore potentially embarrassing T-shirts and tried to guess how many people had noticed them — showed we substantially overestimate how visible we are. We also overestimate how much attention others pay to our contributions in group discussions.
Once you know there’s lipstick on your teeth, it feels like the entire room has been studying your mouth for an hour. The person three tables away noticed for two seconds and went back to their own lunch.
When to speak up (and when to bite your tongue)
The line I’ve landed on after years of airport mirrors and hotel bathrooms: is it information they’re missing, or is it my opinion?
Food between their teeth is information. A typo on the slide they’re about to present is information. An open zipper is information. “I don’t love that haircut on you” is my opinion, and I can hold it.
If it’s small, accidental, and fixable in seconds, tell them — quietly, without a dramatic preamble. The phrasing matters less than you’d think. “You’ve got a little something in your teeth.” “I think your zipper is open.” “Just before you go in, there’s a small stain on the back of your jacket.” Say it, let the moment end, move on.
One caveat from the feedback research worth keeping: unsolicited advice lands differently when the person wasn’t in the mood to receive it at all. A short heads-up about something they can fix is kind. An unsolicited opinion about their body or their style is a different interaction entirely.
And if the only “fix” available is making them self-conscious for the rest of the evening while the actual problem can’t be addressed for hours? Sometimes the kinder move is to let it ride.
The 2-Minute Fix
Next time you spot something on a colleague, a fellow traveler, even yourself in a gate reflection: ask the one question. If I were them, would I want to know? For a fixable, fix-now problem, the answer is almost always yes — and a two-second whisper beats forty minutes of silent dreading.
FAQ
Should you tell someone they have food in their teeth?
If you can do it discreetly, yes. It’s information they don’t have, they can fix it immediately, and the research says people want to be told more often than we predict.
Should you tell someone their zipper is open?
Same logic. A quiet word before more people notice. Keep the wording plain, don’t announce it across the room, and move on once they’ve heard it.
What if the person is a stranger?
The same question works: would this let them fix something accidental they don’t know about? A brief, discreet heads-up is usually welcome even from a stranger.
Bottom line
Most of us would rather be told. Most of us also overestimate how much anyone else is staring. So the next time something is fixable in about ten seconds, ask yourself what you’d want, and then just say it. Quietly, kindly, and before the next coffee order.
Claire Bennett spent eight years buying beauty products in New York, Paris, and Seoul before going full-time on this blog. She lives out of a carry-on, tests everything in transit, and writes about the routines that survive it. claire@glowonthemove.com