Why Do We Laugh? WE DON'T KNOW!

True laughter is involuntary – that's why the milk comes gushing out your nose. Only human beings are born with this ability (a Laughing Hyena is not really laughing) and babies begin giggling at 4 months old. And while true laughter is contagious, it is also something not easily faked. But WHY do we laugh – it's not because of jokes. Over a 10-year period, one doctor studied 2,000 laugh-inducing situations and discovered that most of the time a guffaw was not the result of a punch line. Maybe someday we will understand why we are ticklish, too.