The guy next to the guy next to me on the airplane told the guy next to me “Hey, man, I don’t mind the music, but you’re gonna blow your ear drums out.”
I know that this type of unsolicited advice is not typically welcome, but I thought it was nice. After all, did you know your hearing is permanently damaged after only 15 minutes? I didn’t until someone told me that and now I’m very careful about volume.
In terms of unsolicited advice, I can also suggest that you not put Aquaphor up your nostrils when it’s cold outside. I did this in order to stop dry or bloody noses. Who knew that the Vaseline basically melts, coats various parts of your respiratory system, and is pretty bad for you? I didn’t. Now you know, too.