I Think I Want to Be Old: How to Know if *You* Have Turned Old

A fundamental rule of the universe is that old age happens overnight. One day you are young and can handily stay up past eleven, the next you have nose hair and don’t understand the plot of any Avengers movie and you think a Kardashian is a meal delivery service.

All old people are different, of course, so one can’t generalize about them as a group. But it is a fact that all old people are marked by one universal trait: They no longer care who hears them fart.

Here are six more differences be...