Sociology
Laughter as a Social Boundary Maker
Quick fact
Because laughter is involuntary and hard to fake, sharing a laugh signals genuine alignment of values, making it an honest marker of group membership that outsiders rarely replicate.
Why this is interesting
Have you ever laughed at a joke you didn't fully understand, just because everyone else did? That shared laugh might be doing more than you think—it's quietly drawing a line between who's 'in' and who's 'out'.