We watch movies to escape from our lives into a fantasy world of genuine, unending tears.

https://www.youtube.com/watch?v=9SXLonafIJw
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If you've ever cried during a Pixar movie, you are performing emotions in the exact way movie executives want you to. And you're a fool. A crying fool! Above Average made a video exploring the imaginary Pixar SadLab, where scientists figure out exactly how to make you feel just upset enough about a child fish that the tears start flowing. So now we know how they do it. Next, let's figure out why we keep coming back for more.

Sources: Above Average