Quantum Entanglement

Larry: Hey Don, are you, are you familiar with, um, quantum entanglement?
Don: Um, I don't think so, I'm not sure.
Larry: Okay, it's a theory that holds that photons come in pairs that are separated by space and time, but always in instantaneous, inexplicable communication. Einstein calls it "spooky action at a distance." But you know I find it... I find the notion fairly romantic.
Don: How so?
Larry: Well, uh, I mean, we affect each other, even when we don't mean to, even when we don't want to, we're connected, you see, even when we try to be unaffected.
Don: Why do I get the feeling you're talking about my love life?

Numb3rs, Episode 2.01, Judgment Call