Seven or eight years ago I used to tell people "just wait, soon they'll shrink phones down enough that you can just plug it into your ear and walk around with it." Every one just laughed.
Well, that's basically what happened. Now I see people walking around the store with a freakin' headset stuck in their ear. I think some people stick it in when they get out of bed in the morning, and don't take it out till they go to sleep.
Unless you are talking on the damn thing, take it out of your ear, you look like an IDIOT!