Recently when my wife was out of town for a week, I slept alone in our bed. The few times we don't sleep together, I always think of this song, which is off Loudon's 2001 album Last Man on Earth. Specifically, I think of its opening lines: "Experiments and tests have shown/We sleep sounder when alone." When I was single, those lyrics made me feel a little better. Now that I'm married, well, they don't.
The rest of the song, which touches on sleep, sex, death and dreams, is a beaut.