The headphone hole also has a certain number of plugging and use time limit, if the incorrect plugging will be easy to break, there will be a very loose or not tightly plugged image.
Generally, a good headphone interface is plugged and unplugged about 10,000 times, and the headphone plug also has a certain loss, but it depends on the specific situation, of course, plugging and unplugging is harmful to the headphone plug, but the mp3 together with the headphones in the trouser pocket is easy to crush, so do not often plug and unplug the headphones.
It's okay to remove the plug if it's not gold-plated.