I know this is a harsh. You see those guys who walk around with a bluetooth wireless device in their ears. I'm sorry. They look stupid!
I can see wearing one in a car when they are useful has a hands-free device and you can pretend you are jet-fighter pilot. But if you are just walking around, just pull that thing out of your ear and put your cell phone in your pocket. No one's going to call you with that think stuck on your head.
And please, if you are in a public place, never, ever talk into the thing. You look like an idiot!