Recently, on a flight, I and several people in the rows around me started coughing and sniffling. Finally figured out it was perfume an elderly woman, in a seat across the aisle, was wearing. I didn't want to offend her but, when she said something about so many people coughing, as kindly as I could, told her it was probably her perfume and that she might avoid wearing it the next time she flew. She took it well and actually went into the restroom to wash it off. Lo & behold, we all started breathing better. Nice lady. Hated to say something.