Should you ignore the stench in a crowded subway car?

A crowded subway car can bring out some curious behavior.
Not long ago, as the subway train pulled into a downtown station in a Northeast city in the U.S., a group of riders got on board. There were no seats available and little standing room remained. A well-dressed man who looked to be in his 40s got on board with his traveling companion and walked to grab a spot to hang onto in the car. As he made his way in, he looked at the people standing near him and then said in a loud voice to his companion, "That stench. Can you smell that stench? Let's move."
The two passengers moved, but as they did so, the same man repeated, "What a stench. Can you smell that stench?"
Once they'd settled in another spot, the man could again be heard throughout the car commenting on the smell where he'd originally boarded the train.
While it was difficult to determine if the smell emanated from the subway car itself (unfortunate incidents regularly occur on city subway cars) or if a passenger generated the odor, the man seemed to be directing his comments at the people who stood where he originally intended to stand for the ride.
Finally, after yet another loud comment, a passenger standing in that original spot, shouted back, "OK. We heard you." A smattering of laughter and light applause followed. The man curtailed his comments for the remainder of his ride, but his behavior begs the question: What is the right thing to do is when confronted by someone who gives off an unpleasant smell?
If you're in a subway car and it's difficult to pinpoint where the smell is coming from, the question is moot. If the smell bothers you, the right thing to do is simply move to another part of the car. Making boisterous pronouncements solves nothing and risks insulting other passengers who presumably already notice the smell.
But what if it's a friend or family member giving off a bad smell?
Family members might be more comfortable letting a sibling or a child know about the problem, but friends might have more trouble talking about it.
While it may be uncomfortable to alert someone to such a problem, equally uncomfortable is having a friend who later finds out from others ask you why you didn't tell him or her when you smelled on them earlier in the day.
Faced with this problem, the right thing to do would be to find a way to alert your friend. Feelings might be hurt, but the honesty would go a long way toward protecting the friend from embarrassment in among others who might not be so charitable.
There's no need to go into excruciating detail about just how bad the smell might be. Truth dumping, as Sissela Bok called it in her book, Lying: Moral Choice in Public and Private Life (Vintage Books, 1989), goes beyond the call for honesty and can careen into cruel behavior.
It's highly likely that on that subway car, just as many people were eager to get away from the well-dressed man complaining about the odor as they were from the stench. The right thing is to be honest, but kind. 
Jeffrey L. Seglin, author of  The Right Thing: Conscience, Profit and Personal Responsibility in Today's Business and The Good, the Bad, and Your Business: Choosing Right When Ethical Dilemmas Pull You Apart, is a lecturer in public policy and director of the communications programat  Harvard's Kennedy School . 
Follow him on Twitter: @jseglin 
Do you have ethical questions that you need answered? Send them to rightthing@comcast.net. 
(c) 2014 JEFFREY L. SEGLIN. Distributed by TRIBUNECONTENT AGENCY, LLC.