Granted, this video from Business Insider could also be called "Science Proves Things About Love You Already Know" but it is an interesting look at certain behaviors associated with intimacy and affection and the impact they have on lasting relationships. Smiling and listening aren't exactly groundbreaking hacks—nor are they guaranteed to ensure a future marriage with your Tinder date—but it's nice to know that when you ask for a little more appreciation in order to make a relationship work, science is on your side.