I say villains. Public sex: exciting dangerous thrilling and pretty disgusting for those stuck in the subway having to watch your pimply ass thrusting away at your (apparently low self-esteemed-boy-her-daddy-will-surely-be-proud-when-he-sees-his-little)girl on top of those bacteria-ridden-subway seats.
Not to mention risking doing it in front of anyone’s grandma or small child…
PS Wait for the post-coital smoke until after you exit the train, it’s illegal you know.
