5 Couples’ heartbeats synchronize.
When you and your spouse gaze into one another’s eyes, what’s happening behind the scenes is that your heart rates are syncing up, according to research from scientists at the University of California, Davis. When they analyzed 32 heterosexual couples who sat facing one another for three minutes, the researchers found that their heart rates were nearly identical, and they speculate that this occurred because of the strong link between partners on both an emotional and physical level.
