When I am watching a show or a comedy, alone and there’s something funny most of the time I don’t laugh, but when I watch something or see something with friends I laugh more. Why is that?
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It’s not really known why but laughter being contagious is thought to be some sort of laugh detector in humans. Possibly a neural circuit in the brain that responds exclusively to laughter and generates a response of laughter, similar to contagious yawning. It’s brain chemistry. As to what purpose this served evolutionarily, maybe it’s a bonding thing that helped humans to relate to one another and come together as a social species.
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