Most complete is the Quantum Form Follows Function Model. (Q-FFF) stating that all particles have their counterparts to create attraction and pressure as the statistical combination of two pressure opposing photons like the vacuum photon pressure ( the origin of Casimir effect) against the less pushing graviton. The same is active for all other forces. However not all is mechanics but entangled between anti copy universe in the raspberry multiverse. (of the Q-FFF Model)
