One observation that can change how we look at the forces of nature, is the observation that the electron is considered an elementary particle. The electron has mass and charge, but it is a considered one unified thing; elementary particle, and not two things. One way to explain this paradox is that mass and charge are one thing within the electron, or else we should be able to split the electron, further. Picture an aspect of the unified force, where mass; gravity and charge; EM forces are interchangeable, so they appear to us as a single irreducible particle.
An interesting analogy is magnetism, where we have two poles. Although we have two poles which we define as distinct, we do not find any monopoles. They only come in connected pairs, with them being separate, a convention illusion made before particle accelerators. I like to assume the elementary particle nature of the electron, is the same thing; pairing dependent things that cannot exist by themselves like monopoles.
All the atoms of the earth have electrons, which maintain space between the masses of atoms, which is mostly in their nuclei; protons and neutrons. Gravity, via mass, adds pressure and work; temperature to matter, which can alter the states of the matter, with any new state based on a new arrangements of unified force electrons; shift in the pairing.
For example, metallic water has the electrons of water become better conductors than they are in liquid water. Metallic water has a density of about 5gram/cc, with liquid water at about 1 gm/cc. Gravity can create this new state in the electrons and molecules via gravitational pressure. If we made this state of water, by another lab method, we could make water exert more gravity than normal; more mass density in this molecular state. There is a reciprocity implicit of a unified force through connected intermediaries.
Interestingly, electricity was originally assume to be the movement of positive charge. The proton is not an elementary particle so its charge and mass can be separated. However, the convention changed to the electron and negative charge moving in current, which, by virtue of the elementary nature for the electron was not correct to assume two independent things. We need to upgrade since the electron unifies gravity with EM; missing link.