I visited a friend who I know is like exclusively into trance and Tool (what a combo!) and he had a Sarah Maclahlan CD, which i realized was his "sex u up" music, which skeeves me out to this day.
Other fine candidates:
The Last Temptation of the Christ soundtrack
Too $hort: that song where the refrain is "My Dick!"
The Jerky Boys: any
Last Rites by Skinny Puppy
Come Poop with Me, the Triumph the Insult Comic Dog cd, or the DVD and just turn the screen off and play the "You Have To Work Blue" bit on loop. Very erotic.
Prussian Blue
The Survivor television show soundtrack
Akon - I wanna love you (Dirty Version)
Brick, by Ben Folds 5
16 Horsepower: Sackcloth and Ashes
Rush Limbaugh/ EIB Bumper Music CD (I created this myself, but am willing to burn copies. For a fair-market price.)
"Goodbye Horses" Q Lazzarus
"Casimir Pulaski Day " by Soupjam Stevenson
The Crying Game soundtrack
And the ultimate:
A hand-made Opie and Anthony CD where you've chosen all of your favorite bits.
Seeeeeeeeeexxxxxxxyyyyyyyyyyy!