It's the 21st century, and personal music players have become ubiquitous. Even phones can play music nowadays.
Here's a usage tip that's probably not mentioned in any user manual:
Don't wear your earphones while talking to others
It's rude. It makes it look as if you're only (at best) half listening to your collocutor. It's probably equivalent to hurriedly mumbling "yeah.... yeah, all right.... yeah, ok....", while trying to cut a conversation short, or escape it.
"But the music's off!" some may say. We're human, and to humans perception is reality. You WILL be perceived as rude if conversing in person while wearing your earphones.
If you use the materials on this page, or any other page on this web site, you do so at your own risk. They are provided "as is". No warranty is provided or implied. I neither guarantee that the materials will work, nor that they will not be harmful in any way.