Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: The Buggles
I Love You (Miss Robot): This is an incredibly disturbing song even when taken at face value. It moves from disturbing to truly horrifying if one supposes that the singer is not really talking about a robot but about an actual human being, moving it from Kiss Me, I'm Virtual to Sex Slavery.