So, this is pretty simple.
When you go on someones profile, have them listen to your profile music. Nowadays, you have to be on the persons Profile Text. If you leave it, the music stops. This seems like a waste of coding, since if someone goes on your profile they probably won't go to your Profile Text if they have seen it before. I think they should be able to hear the music anywhere on the profile again. If they don't like it, theres always the option to mute it or switch to a different page.
Customer support service by UserEcho