At some point in time, most of us will know the feeling: Your heart flutters when you see your partner walk in the room, and it feels like the time you spend together puts you on top of the world. Being in love is a part of life that many people strive to experience (and it can seem like every character in movies, books, and other stories we enjoy are focused around it in one way or another). There are many different types of love. Some people feel butterflies when they’re infatuated with someone special; happy couples married for years have a deep, profound attachment to each other; and a parent’s love for their children is often regarded as the strongest love one can experience.