The "like" button did not exist a few years ago. And now, it is so deeply embedded in our lives, attaching itself to how we view the world, and ourselves. Every picture, every post is judged by the number nestled in a corner under it. Billions of likes float around every single day. It has been called one of the most addictive features of social media, and for good reason. Our brains release a small amount of dopamine every time we see a ‘like’ - a pleasure rush, similar to munching on a bar of chocolate. And we want to feel that again and again.