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

Laughter is a social behavior – we’re a tribal species, going back hundreds of thousands of years, and laughter is one of those tools we evolved to help us bond with each other and communicate. There have been studies showing that people laugh and smile more in groups than they do when alone, even if they’re listening to the same jokes or watching the same movies. Just being around other people who are laughing can trigger a reaction from us, almost regardless of the source.