Electrons in s-robital shielding outer electrons

[kay]

Why do electrons present in spherical shaped s-orbital shield the outer electrons from the nucleus more effectively as compared to electrons present in p and subsequent orbitals?
Please explain in a layman language I'm just in class 11th. :/

 

[edguy99]

Consider what the S and P orbital look like:

Electrons in the S orbital hang out around the center of the atom, hence providing a pretty good shield. You can see the electrons in the P orbitals are kinda hanging out on the side of the atom often straight out in the x, y or z direction.

 

[kay]

But why and how would being around the nucleus affect shielding effect?