Why does adding a dielectric to a capacitor increase its charge storage?

[mastiffcacher]

I was getting ready for a test in my physics class and have a question that I cannot figure out. Why does adding a dielectric to a capacitor cause the amount of charge that can be stored to increase. I understand what a dielectric is and how a capacitor works but am just not sure why this works this way. Any help would be appreciated.

 

[Klockan3]

When the dielectrics weakens the field by lining up it also creates an emf around the loop which helps in pulling the electrons.

Its how a dipole always gets pulled towards both positive and negative charges since they just have to line up properly, and pulling/getting pulled is the same thing.