Brain signature of desire uncovered in lovesick rodents, and it may be in people, too

Couple sitting at a table in a cafe giggling as one of the pair feeds her partner a piece of cheesecake.

Drop that bow, Cupid — scientists may have discovered a biological signature of desire that underlies strong interpersonal bonds and may explain why getting over an ex or mourning a loved one hurts so much.

The caveat: The research was in lovesick rodents, not in people.