Paranoid
I use to play Ravel's Bolero but could only think doing things with Bo Derek, I realized I couldn't roll over without pain.
Then I used Dukas' Socerers Apprentice but couldn't get Micky and those broomsticks out of my mind.
Then I tried Honegger's Pacific 231. That worked for a while until I had visions of "Sil" being chased by the biotrain on her home planet.
So now, when I want to sleep I put on an old Black Sabbath album - Paranoid.
The wife puts on either Bach's Arioso, Air on a G string, or Jesus Joy....
Why is Bach so soporiferous?