...the loss of irrecoverable moments...

Do you remember? We dozed during our flight. How strange life is that way … our last few hours alone together, this ending to one of the most intimate periods of our life together, the end of my childhood and the beginning of our time as equals, and we spent most of our last minutes sleeping. In separate couches. Life is brutal that way … the loss of irrecoverable moments amid trivia and distraction.

But we were tired. It had been a rough few days

Endymion, chapter 60 - Dan Simmons