Someday

"Why are you always nice to me?" She asked.
"Because someday you might wake up in a meadow, look at the odd plants and realize that you're on a strange world. With a faint memory of being poked and prodded by aliens going through your mind, you start to walk. When you come across me, lying there unconscious you think; 'Well, I was hoping for someone better looking, but he was always nice to me.' And you drop the large rock you were carrying.