Here are 25 mind-blowing psychological facts about love: 1. Love causes a couple's heart rate to synchronize. When you are deeply committed to someone in a relationship, you will notice that your ...

3. Men are usually the ones to say 'I love you,' first. Drazen Zigic / Shutterstock. Men are often stereotyped as unemotional, cold, or even scared of commitment when it comes to settling down in ...