Why do we keep rewatching the same films and TV shows?

Friends, Harry Potter, The Office, Home Alone, Love Actually… Most of us have that series or that film we’ve seen at least ten times. And yet, when stress kicks in or a rainy Sunday arrives, we sink into the sofa and press play again. It’s almost like we’re drawn back to stories we already know by heart. So what makes us hit replay? But why do we rely on these “comfort movies”? Are there any other upsides? In under 3 …