Lost the Backs to Your Earrings?

I keep brand new pencils at my desk with unused erasers. There have been so many times that I have lost the backing to an earring, that I came up with the idea to slice off the eraser and use it as a "backing" for the pierced earring. The pencil then can have one of those slip-on erasers added to replace the one cut off.

By JoAn