At a subatomic level, what we perceive as "touch" is actually just electromagnetic repulsion. Every atom is surrounded by a cloud of negatively charged electrons. Because charges repel, the electrons in your hand push against the electrons in an object long before they ever make contact, leaving a microscopic gap of empty space between you. However, according to quantum mechanics, these particles behave like probability waves rather than solid objects, meaning there is a non-zero statistical chance that they could "tunnel" through the barrier of another object rather than bounce off. If you were to defy this repulsion and force the nuclei of the atoms to actually touch, you would overcome the Coulomb barrier and trigger nuclear fusion, releasing a massive amount of energy. Music composed by Bert Cole (bitbybitsound.com)
If you touch something and your atoms align in just the perfect way, there's an extremely low chance you could phase right through it like a ghost...
