Why seeing someone else laughing at a certain joke makes you crack up yourself while you wouldn’t have any reaction alone?

Question

just the title.

In: 10

Answer 1

Because humans are social creatures and laughter is an action that is ingrained in our DNA to help build those social bonds necessary for groups to stick together.

Things like laughter, smiling, crying, screaming, looking embarrassed, etc etc all those un-spoken emotional things are how our ancestors communicated before we developed speech.

So when you’re around someone that’s laughing, you’re much more likely to laugh too,