Mattia thought that he and Alice were like that, twin primes, alone and lost, close but not close enough to really touch each other.

Do you really like studying?" Mattia nodded. "Why?" "It's the only thing I know how to do," he said shortly. He wanted to tell her that he liked studying because you can do it alone, because all the things you study are already dead, cold, and chewed over. He wanted to tell her that the pages of the schoolbooks were all the same temperature, that they left you time to choose, that they never hurt you and you couldn't hurt them either. But he said nothing.

Choices are made in brief seconds and paid for in the time that remains

She tried to open the bottle, but the top slipped through her fingers without moving. He took the bottle from her hand and opened it with his thumb and index finger. There was nothing special in the gesture and yet she found it strangely fascinating like a small heroic feat performed specially for her.

She emptied herself of Fabio and of herself, of all the useless efforts she had made to get where she was and find nothing there. With detached curiosity she observed the rebirth of her weaknesses, her obsessions. This time she would let them decide, since she hadn't been able to do anything anyway. Against certain parts of yourself you remain powerless, she said to herself, as she regressed pleasurably to the time when she was a girl.

They lived the slow and invisible interpenetration of their universes, like two stars gravitating around a common axis, in ever tighter orbits, whose clear destiny is to coalesce at some point in space and time.

The scene was set. All that was required was an action, a cold start, instant and brutal as beginnings always are.