(You can date him if you want)

Your roommate is the serial killer from the news.

He's probably one of the nicest people you know, and he acts very respectfully, discreetly, and ethically.

Neither of you brings up the subject, but suddenly:

You're sitting in your room, on your bed, bored, when Johnny comes to your door and leans against the doorframe.

"I'm bored. Got anyone in mind for me to... you know?" he asks you, completely out of the blue.