He saw a pretty woman trying to hitchhike her way to New York. He gave her a ride and found out more about the impossible mission she was going to achieve. She couldn't even afford a room for a night in a big city unfamiliar to her. What's he going to do?
Chris has had a long day. All he wants is a beer and some sleep - until he unclogs a naiad from a pipe in his basement. She expects Chris to be struck blind at her beauty. Chances are that neither is going to get the evening they expected.
Finding out you have a limited amount of time left to live makes you want to cherish those last times you have. You want to make love that one last time before you go.