Igor Krichtafovitch discovered a formula of laughter. As it turned out, humor is a weapon.

Humor is a bloodless verbal fight aiming to raise your status and strengthen your position. Even a friendly banter is a sort of intellectual clash, a kind of training before serious battles. In fact, we try to figure out who's the boss in the family when we poke fun at our loved ones.

"If laughter is akin to aggression, why women have a liking for jesters?"

"A sense of humor is a strong male quality. It is a sign of good intellect. Evolution stakes precisely on the intellect since a smart fellow has more chances of survival. That is why a sense of humor can be a much bigger sign of masculinity than the pumped-up muscles".