pencil n eraser~

Pencil: You know,Im really sorry
Eraser: Sorry for what?U didnt do anything wrong
Pencil: Well,every time when i make mistake,u will b there to erase my mistake. But,as time pass by,part of u r gone
Eraser: Uu see,Im made to do this.Even though i know one of these day I'll b gone,n u have to replace me with another.I'm still happy to do this job.So dont b sad!It worries me!
This is how true friends supposed to b like~