Piece
It's funny to think of how simple it used to be. His heart had always been one whole, his own in its entirety since day one. Then he fell in love and got married, and suddenly it was in two–half for her, and half for himself. They had children, and his heart was broken into four–one for her, one for his boy, one for his little girl, and one for himself. And for a while it stayed this way. It was still simple.
Until he fell in love again.
The piece he kept to himself was all he had left. That last piece, he gave to him.
Well, it wasn't actually given. Rather, it was stolen right from under his nose. It was helpless to resist, there was nothing he could do. One day he just woke up and realized none of it belonged to him anymore. It was the first time he understood what it meant to say, 'You complete me.'