A chemical bond. The ionic one in particular; occurs when an atom loses electrons from its outer shell. When one is lost, the bond becomes twice as strong as it was before. And the resulting bond will require more energy to break than the previous one….but that’s not the point.
You see, people behave in almost the same way. When one bond with a loved one is lost, the existing ones increase in strength. Maybe two fold; maybe a hundred, but we cling to them far much more than before. Im not sure why; maybe the fear of losing another subconsciously pushes us to prevent another from breaking, even if at times it’s beyond our power. But that’s who we are, human; having an inner need to show others that we care, no matter how slight. In some its greater; these are the ones we refer to as being ‘protective.’ In others it may not even show, but it is there; yes, it will show at one point, when you least expect it. No one is fully bad, even 2% good can overcome 98% bad when its from the heart, the same way a candle can light a room in an instant.
And so I conclude that humans were made to love each other. Hate makes love stronger; loss makes love stronger.
Porcelain hearts, only the One who created them knows better.