Punmaster Caitlin says: "You could make a pencil with an eraser on each end, but that would be pointless."
If by "pointless" you mean TOTALLY AND COMPLETELY AWESOME AND ENDLESSLY AMUSING, then yes, I agree with you 100 percent, Caitlin.
Watch the pencil... Poof! It's gone. Luckily you can just erase anything you don't like and mark the jokes you do. That's the beauty of a pencil.