. The FOMO Like
You discover a profile picture with 316 likes. The post's popularity dupes you into believing that you like it too, so... you like it too. You're influenced by the likes that come before you. In the same way that it's easier to jump off a cliff when you see 316 other people jumping, it's easier to like a photo when 316 other people set a precedent. Your desire to join the in-group is indeed so strong, that it's as if you experience FOMO not liking such a popular post.