Headphone jack adapter

Is there an adapter that you can buy to plug into your head phone jack that will then allow you to have two head phone jacks so to people can use different head phones instead of sharing?

Thanks

Yes, this kind of adapter is very common. They can be found at Radio shack, Wal-mart, or just about any electronics type store.

The Apple Store has this: http://store.apple.com/1-800-MY-APP...5Ogye/2.0.0.11.1.0.6.9.3.19.0.1.1.1.1.2.1.0.3

Thanks, I searched my local The Source By Circuit City (Radioshacks new name) and found what what Im looking for.