““She put her arms around me again and we held each other for a long moment, her head on my shoulder, breath warm on my neck, and suddenly I wanted nothing more than to close all the little gaps that existed between our bodies, to collapse into one being. But then she pulled away and kissed my forehead and started back toward the others. I was too dazed to follow right away, because there was something new happening, a wheel inside my heart I’d never noticed before, and it was spinning so fast it made me dizzy. And the farther away she got, the faster it spun, like there was an invisible cord unreeling from it that stretched between us, and if she went too far it would snap—and kill me.””