Laughter is a unique kind of communication—it’s the only response where something mentally complex can trigger an automatic, physical reaction. Want an example? Here’s a joke that’s sure to make you chuckle:

Wife: I’ve got a bag of old clothes I’d like to donate.
Husband: Why not just throw them away? That’s way easier.
Wife: Because there are people in need who could use them.
Husband: Sweetheart, if someone can fit into your clothes, they’re definitely not starving.