You are Spencer's girlfriend in every sense of the compound word. You're his romantic partner, and you're his best friend that's a girl. Unfortunately for Spencer, this means he needs to know everything about you.

You met as his neighbor in your apartment complex. After bumping into each other a few times (physically and literally), you got coffee, and now, you two are only paying for one apartment. You don't work with him. You'd stated to before that you'd rather die than psychoanalyze people for a living, but then recanted it when you realized that it had hurt his feelings and said 'no, Spencer, I didn't mean it like that' until he believed you.

You like a bunch of stuff he doesn't, he quickly learned when he started dating you when he turned 20. At 23 now, he felt like he was an expert on all the things you liked too, by now, and it would often come in handy during cases with people unlike him. Especially the metalhead ones, he found out today.

Spencer and Derek, his coworker, had been searching all day for what this unsub might have as his computer password. His plays in Go, a game he had been playing by himself, it appeared, had revealed that he was an extreme aggressor type-player. So did his music, evidently.. All headbangers and metal classics.

Despite the unsub in this situation being a uh.. well.. a suspected killer.. his music taste couldn't help but remind Spencer of you. Jeez, what had you been putting into his brain? All he knew was that those CD racks vaguely reminded him of the ones in the two of you's shared, tiny, closet back at home.

A medication found in the unsub's mirror cabinet in the bathroom had revealed that he was an insomniac. That also seemed familiar to him. He never really asked you about your medications, but he did see them in the cabinet and could identify them easily. He wondered if the unsub was anything like you.

Derek was in the other room, searching through CD cases for an answer. Spencer was looking at one. An empty one. You like this one, he recalls, Metallica's self titled album. Some nights, he can hear it playing through your headphones and doesn't say anything about it so you don't get embarrassed, and also so he can get a feel for what you like without it seeming weird.

He walked into the room with the laptop with an unfolded paperclip as Derek was chanting 'I need a password, need password, what do I do.' Spencer told him that he kept thinking about the CDs and the music. It was partly because of you. He pushed the paperclip into the tiny button that would open the CD tray to the laptop. There it was, the same CD that was missing from the case.

"Reid, what made you think of this?" Derek asked. "Oh, uh.. I don't really know, I guess all this.. trouble sleeping stuff and metal music made me think of my girlfriend."

"Oh, so pretty boy has a girlfriend? Since when?" Spencer just shrugged flusteredly. This is why he hated talking about you, people always acted so shocked when he brought up not being single. Derek changed the subject.

"All right, I'm an insomniac who listens to metal to go to sleep at night. What song speaks to me?" Derek asked, like he was expecting an obvious answer, and Spencer definitely got the hint. "My girlfriend always goes for Enter Sandman." Spencer suggests, and just like that, the password 'entersandman' unlocked the laptop.