This is why we often find ourselves distracted and daydreaming about crushes. And when you’re constantly in proximity to someone, it can be pretty damn hard to switch it off. This, Dr. Wheatley explains, has something to do with the recency effect, another psychological theory that says you’re more likely to remember something that happened, well, recently. If you spent all day with your work crush on a Thursday, it’s more likely you’ll be thinking about them that night rather than the hot waiter who called you pretty last weekend. And it’s those constant interactions that keep your crush on your mind. But it only feels good if, of course, those feelings are reciprocated. “If it’s unrequited, that dopamine hit is going to be negated.”