Electrons are proton crazy. Dipole-dipole attractions occur because the opposite ends attract. I kind of dipole called hydrogen bonding. Electrons are proton crazy. The greater their atomic mass is, the greater they will attract.
Electrons attract protons from other sources.
And this is called Van der Waals forces. Electrons are proton crazy. Wish you would covalently bond with me my friend. We could, share electrons between our atoms and that would be the end. The atoms may have different electronegativities.