Record Conversation's in Your Ear - Olympus TP-7

I had to show you this gadget. Have you ever been in a phone conversation you simply felt you had to record and wasn't able to do it? Or are you just paranoid and tend to record events from your life, like talking to your mother, girlfriend or boss?

If so, for $18 you can have this Olympus TP-7 microphone that goes in your ear. That means that what you hear gets recorded. Say you have a tumultuous conversation from your landline and you wish you recorded it. Nothing easier with the Olympus TP-7 waiting in your ear. Turn it on and it will record everything you hear. As long as it's connected to a recorder of any type.

Does this mean you'll have to wear the microphone at all times as you'll never know when you'll have to use it?