Some movies are such a big deal that people can't stop talking about them, making those who haven't seen it yet feel totally left out of the loop- and lost in every related conversation.
This cinematic mania makes some people want to see every buzzworthy new movie that comes out just so they can talk about it with their friends, others do like the girl in this Dorkly comic by Julia Lepetit and stay lost until they see the film a year later.
Personally I like to just read a bit about the movie online so I don't feel left out until I see it, because all of those so-called "spoilers" turn out to be fairly obvious and no big deal, and so not worth all the secrecy and drama. It's just a movie, people! Get a life!